192-407: Space exploration is the use of astronomy and space technology to explore outer space . While the exploration of space is currently carried out mainly by astronomers with telescopes , its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight . Space exploration, like its classical form astronomy , is one of the main sources for space science . While
384-526: A pars pro toto for the entire country. Many Dutch people object to the country being referred to as Holland instead of the Netherlands , on much the same grounds as many Welsh or Scottish people object to the United Kingdom being referred to as England. In particular, those from regions other than Holland find it undesirable or misrepresentative to use the term Holland for the whole country, as
576-448: A binary black hole . A second gravitational wave was detected on 26 December 2015 and additional observations should continue but gravitational waves require extremely sensitive instruments. The combination of observations made using electromagnetic radiation, neutrinos or gravitational waves and other complementary information, is known as multi-messenger astronomy . One of the oldest fields in astronomy, and in all of science,
768-520: A gravity assist from Jupiter . Its closest approach to Pluto was on 14 July 2015; scientific observations of Pluto began five months prior to closest approach and continued for 16 days after the encounter. The New Horizons mission also performed a flyby of the small planetesimal Arrokoth , in the Kuiper belt , in 2019. This was its first extended mission. Although many comets have been studied from Earth sometimes with centuries-worth of observations, only
960-452: A Spanish prisoner, nailed it on a vessel's prow, and invited the townsmen to come and fasten their teeth in it, which many did with savage satisfaction. The Duke of Alba attempted to suppress the Protestant movement in the Netherlands. Netherlanders were "burned, strangled, beheaded, or buried alive" by his " Blood Council " and Spanish soldiers. Bodies were displayed along roads to terrorise
1152-601: A better appreciation of the Red Planet but also yield further insight into the past, and possible future, of Earth. The exploration of Mars has come at a considerable financial cost with roughly two-thirds of all spacecraft destined for Mars failing before completing their missions, with some failing before they even began. Such a high failure rate can be attributed to the complexity and large number of variables involved in an interplanetary journey, and has led researchers to jokingly speak of The Great Galactic Ghoul which subsists on
1344-459: A close flyby of Saturn's moon Titan, resulting in a trajectory incompatible with a Pluto flyby. Voyager 2 never had a plausible trajectory for reaching Pluto. After an intense political battle, a mission to Pluto dubbed New Horizons was granted funding from the United States government in 2003. New Horizons was launched successfully on 19 January 2006. In early 2007 the craft made use of
1536-573: A conspicuous anticyclone storm system rivaled in size only by Jupiter's Great Red Spot . Neptune also proved to have the fastest winds of any planet in the Solar System, measured as high as 2,100 km/h. Voyager 2 also examined Neptune's ring and moon system . It discovered 900 complete rings and additional partial ring "arcs" around Neptune. In addition to examining Neptune's three previously known moons, Voyager 2 also discovered five previously unknown moons, one of which, Proteus , proved to be
1728-478: A diet of Mars probes. This phenomenon is also informally known as the " Mars Curse ". In contrast to overall high failure rates in the exploration of Mars, India has become the first country to achieve success of its maiden attempt. India's Mars Orbiter Mission (MOM) is one of the least expensive interplanetary missions ever undertaken with an approximate total cost of ₹ 450 Crore ( US$ 73 million ). The first mission to Mars by any Arab country has been taken up by
1920-650: A distinct governmental structure of their own. They were utilized as a buffer zone between the Republic and the Spanish-controlled Southern Netherlands . In the Dutch Golden Age , spanning much of the 17th century, the Dutch Empire grew to become one of the major seafaring and economic powers. Science, military and art (especially painting ) were among the most acclaimed in the world. By 1650,
2112-472: A few clouds in the images of the planet. The magnetosphere of Uranus, however, proved to be unique, being profoundly affected by the planet's unusual axial tilt. In contrast to the bland appearance of Uranus itself, striking images were obtained of the Moons of Uranus, including evidence that Miranda had been unusually geologically active. The exploration of Neptune began with the 25 August 1989 Voyager 2 flyby,
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#17328769947552304-650: A few comets have been closely visited. In 1985, the International Cometary Explorer conducted the first comet fly-by ( 21P/Giacobini-Zinner ) before joining the Halley Armada studying the famous comet. The Deep Impact probe smashed into 9P/Tempel to learn more about its structure and composition and the Stardust mission returned samples of another comet's tail. The Philae lander successfully landed on Comet Churyumov–Gerasimenko in 2014 as part of
2496-558: A few milliseconds to thousands of seconds before fading away. Only 10% of gamma-ray sources are non-transient sources. These steady gamma-ray emitters include pulsars, neutron stars , and black hole candidates such as active galactic nuclei. In addition to electromagnetic radiation, a few other events originating from great distances may be observed from the Earth. In neutrino astronomy , astronomers use heavily shielded underground facilities such as SAGE , GALLEX , and Kamioka II/III for
2688-518: A large number of Earth observation satellites have been deployed specifically to explore Earth from a space-based perspective. These satellites have significantly contributed to the understanding of a variety of Earth-based phenomena. For instance, the hole in the ozone layer was found by an artificial satellite that was exploring Earth's atmosphere, and satellites have allowed for the discovery of archeological sites or geological formations that were difficult or impossible to otherwise identify. The Moon
2880-508: A long record of social tolerance , having legalised prostitution and euthanasia , along with maintaining a liberal drug policy . The Netherlands allowed women's suffrage in 1919 and was the first country to legalise same-sex marriage in 2001. Its mixed-market advanced economy has the eleventh-highest per capita income globally. The Hague holds the seat of the States General , Cabinet , and Supreme Court . The Port of Rotterdam
3072-542: A mercantile middle class began to develop in these urban areas, especially in Flanders, and later Brabant. Wealthy cities started to buy certain privileges for themselves from the sovereign. Around 1100 AD, farmers from Flanders and Utrecht began draining and cultivating uninhabited swampy land in the western Netherlands, making the emergence of the County of Holland as the centre of power possible. The title of Count of Holland
3264-552: A model allows astronomers to select between several alternative or conflicting models. Theorists also modify existing models to take into account new observations. In some cases, a large amount of observational data that is inconsistent with a model may lead to abandoning it largely or completely, as for geocentric theory , the existence of luminiferous aether , and the steady-state model of cosmic evolution. Phenomena modeled by theoretical astronomers include: Modern theoretical astronomy reflects dramatic advances in observation since
3456-661: A number of important astronomers. Richard of Wallingford (1292–1336) made major contributions to astronomy and horology , including the invention of the first astronomical clock, the Rectangulus which allowed for the measurement of angles between planets and other astronomical bodies, as well as an equatorium called the Albion which could be used for astronomical calculations such as lunar , solar and planetary longitudes and could predict eclipses . Nicole Oresme (1320–1382) and Jean Buridan (1300–1361) first discussed evidence for
3648-598: A planned crewed landing to occur with Artemis III . The rise of the private space industry also began in earnest in the 2010s with the development of private launch vehicles, space capsules and satellite manufacturing. In the 2000s, China initiated a successful crewed spaceflight program while India launched the Chandrayaan programme , while the European Union and Japan have also planned future crewed space missions. The two primary global programs gaining traction in
3840-562: A repeating cycle known as a saros . Following the Babylonians, significant advances in astronomy were made in ancient Greece and the Hellenistic world. Greek astronomy is characterized from the start by seeking a rational, physical explanation for celestial phenomena. In the 3rd century BC, Aristarchus of Samos estimated the size and distance of the Moon and Sun , and he proposed a model of
4032-612: A sort of bubble of particles made in the Galaxy by the Sun's solar wind . The Sun is a major focus of space exploration. Being above the atmosphere in particular and Earth's magnetic field gives access to the solar wind and infrared and ultraviolet radiations that cannot reach Earth's surface. The Sun generates most space weather , which can affect power generation and transmission systems on Earth and interfere with, and even damage, satellites and space probes. Numerous spacecraft dedicated to observing
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#17328769947554224-433: A state of almost continual war or paradoxically formed personal unions. As Frankish settlement progressed from Flanders and Brabant, the area quickly became Old Low Franconian (or Old Dutch). Around 1000 AD, due to several agricultural developments, the economy started to develop at a fast pace, and the higher productivity allowed workers to farm more land or become tradesmen. Towns grew around monasteries and castles , and
4416-608: A substantial amount of work in the realms of theoretical and observational physics. Some areas of study for astrophysicists include their attempts to determine the properties of dark matter , dark energy , and black holes ; whether or not time travel is possible, wormholes can form, or the multiverse exists; and the origin and ultimate fate of the universe . Topics also studied by theoretical astrophysicists include Solar System formation and evolution ; stellar dynamics and evolution ; galaxy formation and evolution ; magnetohydrodynamics ; large-scale structure of matter in
4608-497: A total area of 41,543 km (16,040 sq mi), including water bodies, and a land area of 33,481 km (12,927 sq mi). The Caribbean Netherlands has a total area of 328 km (127 sq mi) It lies between latitudes 50° and 54° N , and longitudes 3° and 8° E . The Netherlands is geographically very low relative to sea level and is considered a flat country, with about 26% of its area and 21% of its population below sea level. The European part of
4800-427: Is visible light , or more generally electromagnetic radiation . Observational astronomy may be categorized according to the corresponding region of the electromagnetic spectrum on which the observations are made. Some parts of the spectrum can be observed from the Earth's surface, while other parts are only observable from either high altitudes or outside the Earth's atmosphere. Specific information on these subfields
4992-467: Is Dutch, with West Frisian as a secondary official language in the province of Friesland . Dutch, English, and Papiamento are official in the Caribbean territories . Netherlands literally means "lower countries" in reference to its low elevation and flat topography, with 26% below sea level . Most of the areas below sea level, known as polders , are the result of land reclamation that began in
5184-580: Is a branch of astronomy that studies the universe as a whole. Astronomy is one of the oldest natural sciences. The early civilizations in recorded history made methodical observations of the night sky . These include the Egyptians , Babylonians , Greeks , Indians , Chinese , Maya , and many ancient indigenous peoples of the Americas . In the past, astronomy included disciplines as diverse as astrometry , celestial navigation , observational astronomy , and
5376-604: Is a country in Northwestern Europe , with overseas territories in the Caribbean . It is the largest of the four constituent countries of the Kingdom of the Netherlands . The Netherlands consists of twelve provinces ; it borders Germany to the east and Belgium to the south, with a North Sea coastline to the north and west. It shares maritime borders with the United Kingdom , Germany, and Belgium. The official language
5568-584: Is absorbed by the Earth's atmosphere, requiring observations at these wavelengths to be performed from the upper atmosphere or from space. Ultraviolet astronomy is best suited to the study of thermal radiation and spectral emission lines from hot blue stars ( OB stars ) that are very bright in this wave band. This includes the blue stars in other galaxies, which have been the targets of several ultraviolet surveys. Other objects commonly observed in ultraviolet light include planetary nebulae , supernova remnants , and active galactic nuclei. However, as ultraviolet light
5760-591: Is also believed that the ruins at Great Zimbabwe and Timbuktu may have housed astronomical observatories. In Post-classical West Africa , Astronomers studied the movement of stars and relation to seasons, crafting charts of the heavens as well as precise diagrams of orbits of the other planets based on complex mathematical calculations. Songhai historian Mahmud Kati documented a meteor shower in August 1583. Europeans had previously believed that there had been no astronomical observation in sub-Saharan Africa during
5952-583: Is an inseparable part of the discipline of astrobiology. Astrobiology concerns itself with interpretation of existing scientific data , and although speculation is entertained to give context, astrobiology concerns itself primarily with hypotheses that fit firmly into existing scientific theories . This interdisciplinary field encompasses research on the origin of planetary systems , origins of organic compounds in space , rock-water-carbon interactions, abiogenesis on Earth, planetary habitability , research on biosignatures for life detection, and studies on
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6144-417: Is believed to have orbited Earth at a height of about 250 km (160 mi). It had two radio transmitters (20 and 40 MHz), which emitted "beeps" that could be heard by radios around the globe. Analysis of the radio signals was used to gather information about the electron density of the ionosphere, while temperature and pressure data was encoded in the duration of radio beeps. The results indicated that
6336-427: Is easily absorbed by interstellar dust , an adjustment of ultraviolet measurements is necessary. X-ray astronomy uses X-ray wavelengths . Typically, X-ray radiation is produced by synchrotron emission (the result of electrons orbiting magnetic field lines), thermal emission from thin gases above 10 (10 million) kelvins , and thermal emission from thick gases above 10 Kelvin. Since X-rays are absorbed by
6528-414: Is founded on the detection and analysis of infrared radiation, wavelengths longer than red light and outside the range of our vision. The infrared spectrum is useful for studying objects that are too cold to radiate visible light, such as planets, circumstellar disks or nebulae whose light is blocked by dust. The longer wavelengths of infrared can penetrate clouds of dust that block visible light, allowing
6720-403: Is from these clouds that solar systems form. Studies in this field contribute to the understanding of the formation of the Solar System , Earth's origin and geology, abiogenesis , and the origin of climate and oceans. Astrobiology is an interdisciplinary scientific field concerned with the origins , early evolution , distribution, and future of life in the universe . Astrobiology considers
6912-416: Is given below. Radio astronomy uses radiation with wavelengths greater than approximately one millimeter, outside the visible range. Radio astronomy is different from most other forms of observational astronomy in that the observed radio waves can be treated as waves rather than as discrete photons . Hence, it is relatively easier to measure both the amplitude and phase of radio waves, whereas this
7104-645: Is not as easily done at shorter wavelengths. Although some radio waves are emitted directly by astronomical objects, a product of thermal emission , most of the radio emission that is observed is the result of synchrotron radiation , which is produced when electrons orbit magnetic fields . Additionally, a number of spectral lines produced by interstellar gas , notably the hydrogen spectral line at 21 cm, are observable at radio wavelengths. A wide variety of other objects are observable at radio wavelengths, including supernovae , interstellar gas, pulsars , and active galactic nuclei . Infrared astronomy
7296-682: Is now the southern Netherlands: the Menapii and the Eburones . Under Augustus , the Roman Empire would conquer the entirety of the modern day Netherlands, incorporating it into the province of Germania Antiqua in 7 BC, but would be repelled back across the Rhine after the Battle of Teutoburg Forest in 9 AD, with the Rhine becoming fixed as Rome's permanent northern frontier around 12 AD. Notable towns would arise along
7488-471: Is one of the few sciences in which amateurs play an active role . This is especially true for the discovery and observation of transient events . Amateur astronomers have helped with many important discoveries, such as finding new comets. Astronomy (from the Greek ἀστρονομία from ἄστρον astron , "star" and -νομία -nomia from νόμος nomos , "law" or "culture") means "law of the stars" (or "culture of
7680-624: Is the busiest in Europe . Schiphol is the busiest airport in the Netherlands , and the fourth busiest in Europe . Being a developed country , the Netherlands is a founding member of the European Union , Eurozone , G10 , NATO , OECD , and WTO , as well as a part of the Schengen Area and the trilateral Benelux Union. It hosts intergovernmental organisations and international courts , many of which are in The Hague. The countries that comprise
7872-476: Is the branch of astronomy that employs the principles of physics and chemistry "to ascertain the nature of the astronomical objects , rather than their positions or motions in space". Among the objects studied are the Sun , other stars , galaxies , extrasolar planets , the interstellar medium and the cosmic microwave background . Their emissions are examined across all parts of the electromagnetic spectrum , and
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8064-453: Is the measurement of the positions of celestial objects. Historically, accurate knowledge of the positions of the Sun, Moon, planets and stars has been essential in celestial navigation (the use of celestial objects to guide navigation) and in the making of calendars . Careful measurement of the positions of the planets has led to a solid understanding of gravitational perturbations , and an ability to determine past and future positions of
8256-712: The Batavian rebellion of 69 AD but were eventually defeated. The Batavi later merged with other tribes into the confederation of the Salian Franks, whose identity emerged in the first half of the third century. Salian Franks appear in Roman texts as both allies and enemies. They were forced by the confederation of the Saxons from the east to move over the Rhine into Roman territory in the fourth century. From their new base in West Flanders and
8448-467: The Cassini spacecraft, which lasted from 2004 until 2017. Saturn has at least 62 known moons , although the exact number is debatable since Saturn's rings are made up of vast numbers of independently orbiting objects of varying sizes. The largest of the moons is Titan , which holds the distinction of being the only moon in the Solar System with an atmosphere denser and thicker than that of Earth. Titan holds
8640-472: The Compton Gamma Ray Observatory or by specialized telescopes called atmospheric Cherenkov telescopes . The Cherenkov telescopes do not detect the gamma rays directly but instead detect the flashes of visible light produced when gamma rays are absorbed by the Earth's atmosphere. Most gamma-ray emitting sources are actually gamma-ray bursts , objects which only produce gamma radiation for
8832-520: The Earth's atmosphere , all X-ray observations must be performed from high-altitude balloons , rockets , or X-ray astronomy satellites . Notable X-ray sources include X-ray binaries , pulsars , supernova remnants , elliptical galaxies , clusters of galaxies , and active galactic nuclei . Gamma ray astronomy observes astronomical objects at the shortest wavelengths of the electromagnetic spectrum. Gamma rays may be observed directly by satellites such as
9024-506: The Eighty Years' War between the Provinces and their Spanish ruler began. The level of ferocity exhibited by both sides can be gleaned from a Dutch chronicler's report: On more than one occasion men were seen hanging their own brothers, who had been taken prisoners in the enemy's ranks... A Spaniard had ceased to be human in their eyes. On one occasion, a surgeon at Veer cut the heart from
9216-629: The European Economic Community and European Atomic Energy Community . In 1993, the former two were incorporated into the European Union . Government-encouraged emigration efforts to reduce population density prompted some 500,000 Dutch to leave the country after the war. The 1960s and 1970s were a time of great social and cultural change, such as rapid de- pillarisation . Students and other youth rejected traditional mores and pushed for change in matters such as women's rights , sexuality , disarmament and environmental issues . In 2002
9408-563: The Hilversum culture . Iron ore brought a measure of prosperity and was available throughout the country. Smiths travelled from settlement to settlement with bronze and iron, fabricating tools on demand. The King's grave of Oss (700 BC) was found in a burial mound, the largest of its kind in Western Europe. The deteriorating climate in Scandinavia from 850 BC and 650 BC might have triggered
9600-662: The Holland region only comprises two of the twelve provinces, and 38% of Dutch citizens. As of 2019, the Dutch government officially has preferred the Netherlands instead of Holland when talking about the country . Often Holland or Hollanders is used by the Flemish to refer to the Dutch in the Netherlands, and by the Southern Dutch (Dutch living " below the great rivers ", a natural cultural, social and religious boundary formed by
9792-654: The International Space Station (ISS). With the substantial completion of the ISS following STS-133 in March 2011, plans for space exploration by the U.S. remained in flux. The Constellation program aiming for a return to the Moon by 2020 was judged unrealistic by an expert review panel reporting in 2009. Constellation ultimately was replaced with the Artemis Program , of which the first mission occurred in 2022 , with
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#17328769947559984-721: The Japanese occupation of the Dutch East Indies . In 1944–45, the First Canadian Army liberated much of the Netherlands. Soon after VE Day , the Dutch fought a colonial war against the new Republic of Indonesia . In 1954, the Charter for the Kingdom of the Netherlands reformed the political structure as a result of international pressure to carry out decolonisation . The Dutch colonies of Surinam and Curaçao and Dependencies and
10176-754: The Limes Germanicus : Nijmegen and Voorburg . In the first part of Gallia Belgica , the area south of the Limes became part of the Roman province of Germania Inferior . The area to the north of the Rhine, inhabited by the Frisii, remained outside Roman rule, while the Germanic border tribes of the Batavi and Cananefates served in the Roman cavalry . The Batavi rose against the Romans in
10368-939: The Milky Way , as its own group of stars was only proven in the 20th century, along with the existence of "external" galaxies. The observed recession of those galaxies led to the discovery of the expansion of the Universe . In 1919, when the Hooker Telescope was completed, the prevailing view was that the universe consisted entirely of the Milky Way Galaxy. Using the Hooker Telescope, Edwin Hubble identified Cepheid variables in several spiral nebulae and in 1922–1923 proved conclusively that Andromeda Nebula and Triangulum among others, were entire galaxies outside our own, thus proving that
10560-762: The Muslim world by the early 9th century. In 964, the Andromeda Galaxy , the largest galaxy in the Local Group , was described by the Persian Muslim astronomer Abd al-Rahman al-Sufi in his Book of Fixed Stars . The SN 1006 supernova , the brightest apparent magnitude stellar event in recorded history, was observed by the Egyptian Arabic astronomer Ali ibn Ridwan and Chinese astronomers in 1006. Iranian scholar Al-Biruni observed that, contrary to Ptolemy ,
10752-659: The Nordwestblock culture. The first author to describe the coast of Holland and Flanders was the geographer Pytheas , who noted in c. 325 BC that in these regions, "more people died in the struggle against water than in the struggle against men." During the Gallic Wars , the area south and west of the Rhine was conquered by Roman forces under Julius Caesar from 57 BC to 53 BC. Caesar describes two main Celtic tribes living in what
10944-555: The Renaissance , Nicolaus Copernicus proposed a heliocentric model of the solar system. His work was defended by Galileo Galilei and expanded upon by Johannes Kepler . Kepler was the first to devise a system that correctly described the details of the motion of the planets around the Sun. However, Kepler did not succeed in formulating a theory behind the laws he wrote down. It was Isaac Newton , with his invention of celestial dynamics and his law of gravitation , who finally explained
11136-467: The Rhine - Meuse river estuary . In the east of the Netherlands, remains are found of the last ice age , which ended approximately ten thousand years ago. As the continental ice sheet moved in from the north, it pushed moraine forward. The ice sheet halted as it covered the eastern half of the Netherlands. After the ice age ended, the moraine remained in the form of a long hill-line. The cities of Arnhem and Nijmegen are built on these hills. Over
11328-555: The Solar System where the Earth and planets rotated around the Sun, now called the heliocentric model. In the 2nd century BC, Hipparchus discovered precession , calculated the size and distance of the Moon and invented the earliest known astronomical devices such as the astrolabe . Hipparchus also created a comprehensive catalog of 1020 stars, and most of the constellations of the northern hemisphere derive from Greek astronomy. The Antikythera mechanism ( c. 150 –80 BC)
11520-555: The States General , was headquartered in The Hague and comprised representatives from each of the seven provinces. The sparsely populated region of Drenthe was part of the republic, albeit not considered a province in its own right. Moreover, during the Eighty Years' War , the Republic came to occupy a number of Generality Lands located in Flanders , Brabant and Limburg . These areas were primarily inhabited by Roman Catholics and lacked
11712-466: The asteroids , the new planets Uranus and Neptune , and many more satellites . The Orbiting Astronomical Observatory 2 was the first space telescope launched 1968, but the launching of Hubble Space Telescope in 1990 set a milestone. As of 1 December 2022, there were 5,284 confirmed exoplanets discovered. The Milky Way is estimated to contain 100–400 billion stars and more than 100 billion planets . There are at least 2 trillion galaxies in
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#173287699475511904-542: The dwarf planets Ceres and Pluto were orbited by Dawn and passed by New Horizons , respectively. This accounts for flybys of each of the eight planets in the Solar System , the Sun , the Moon , and Ceres and Pluto (two of the five recognized dwarf planets ). The first interplanetary surface mission to return at least limited surface data from another planet was the 1970 landing of Venera 7 , which returned data to Earth for 23 minutes from Venus . In 1975, Venera 9
12096-652: The euro was introduced as fiat money , and in 2010 the Netherlands Antilles was dissolved . Referendums were held on each island. As a result, Bonaire , Sint Eustatius and Saba (the BES islands) were incorporated as special municipalities upon the dissolution of the Netherlands Antilles. The special municipalities are collectively known as the Caribbean Netherlands . The European Netherlands has
12288-418: The far side of the Moon . India's Chandrayaan-3 in 2023 achieved the world's first landing on the lunar south pole region. Crewed exploration of the Moon began in 1968 with the Apollo 8 mission that successfully orbited the Moon, the first time any extraterrestrial object was orbited by humans. In 1969, the Apollo 11 mission marked the first time humans set foot upon another world. Crewed exploration of
12480-427: The interstellar medium . The study of the abundance of elements and isotope ratios in Solar System objects, such as meteorites , is also called cosmochemistry , while the study of interstellar atoms and molecules and their interaction with radiation is sometimes called molecular astrophysics. The formation, atomic and chemical composition, evolution and fate of molecular gas clouds is of special interest, because it
12672-408: The observable universe . HD1 is the most distant known object from Earth, reported as 33.4 billion light-years away. MW 18014 was a German V-2 rocket test launch that took place on 20 June 1944, at the Peenemünde Army Research Center in Peenemünde . It was the first human-made object to reach outer space , attaining an apogee of 176 kilometers, which is well above the Kármán line . It
12864-526: The phenomena that occur in the cosmos. It uses mathematics , physics , and chemistry in order to explain their origin and their overall evolution . Objects of interest include planets , moons , stars , nebulae , galaxies , meteoroids , asteroids , and comets . Relevant phenomena include supernova explosions, gamma ray bursts , quasars , blazars , pulsars , and cosmic microwave background radiation . More generally, astronomy studies everything that originates beyond Earth's atmosphere . Cosmology
13056-404: The "Netherlands" lost their original deictic meaning . In most Romance languages , the term "Low Countries" is officially used as the name for the Netherlands. The term Holland has frequently been used informally to refer to the whole of the modern country of the Netherlands in various languages, including Dutch and English. In some languages, Holland is used as the formal name for
13248-432: The 14th century . In the Republican period , which began in 1588, the Netherlands entered a unique era of political, economic, and cultural greatness, ranked among the most powerful and influential in Europe and the world; this period is known as the Dutch Golden Age . During this time, its trading companies, the Dutch East India Company and the Dutch West India Company , established colonies and trading posts all over
13440-442: The 1990s, including studies of the cosmic microwave background , distant supernovae and galaxy redshifts , which have led to the development of a standard model of cosmology . This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations. Astrophysics
13632-493: The 2020s are the Chinese-led International Lunar Research Station and the US-led Artemis Program, with its plan to build the Lunar Gateway and the Artemis Base Camp , each having its own set of international partners. The first telescope is said to have been invented in 1608 in the Netherlands by an eyeglass maker named Hans Lippershey , but their first recorded use in astronomy was by Galileo Galilei in 1609. In 1668 Isaac Newton built his own reflecting telescope ,
13824-539: The 490s, Clovis I had conquered and united all these territories in the southern Netherlands in one Frankish kingdom , and from there continued his conquests into Gaul . During this expansion, Franks migrating to the south (modern territory of France and Walloon part of Belgium) eventually adopted the Vulgar Latin of the local population. A widening cultural divide grew with the Franks remaining in their original homeland in
14016-603: The Dutch Republic was attacked by France, England and three German Bishoprics simultaneously, in what would become known as the Franco-Dutch War . At sea , it could successfully prevent the English and French navies from blockading the western shores. On land, however, it was almost taken over by the advancing French and German armies from the east. It managed to turn the tide by inundating parts of Holland . From 1672 to 1712,
14208-641: The Dutch established a presence in India , the Dutch East Indies (now Indonesia ), Formosa (now Taiwan ), and the only western trading post in Japan, Dejima . During the period of Proto-industrialisation , the empire received 50% of textiles and 80% of silks import from the India's Mughal Empire . Many economic historians regard the Netherlands as the first thoroughly capitalist country. In early modern Europe, it had
14400-716: The Dutch owned 16,000 merchant ships. The Dutch East India Company and the Dutch West India Company established colonies and trading posts all over the world. The Dutch settlement in North America began with the founding of New Amsterdam in 1614. In South Africa, the Dutch settled the Cape Colony in 1652. Dutch colonies in South America were established along the many rivers in the fertile Guyana plains, among them Colony of Surinam (now Suriname ). In Asia,
14592-403: The Earth's atmosphere and of their physical and chemical properties", while "astrophysics" refers to the branch of astronomy dealing with "the behavior, physical properties, and dynamic processes of celestial objects and phenomena". In some cases, as in the introduction of the introductory textbook The Physical Universe by Frank Shu , "astronomy" may be used to describe the qualitative study of
14784-625: The European country all became countries within the Kingdom, on a basis of equality. Indonesia had declared its independence in August 1945. Suriname followed in 1975. The Netherlands was one of the founding members of Benelux and NATO . In the 1950s, the Netherlands became one of the six founding countries of the European Communities , following the 1952 establishment of the European Coal and Steel Community , and subsequent 1958 creations of
14976-714: The Frisians were defeated after a series of wars . With the approval of the Franks, the Anglo-Saxon missionary Willibrord converted the Frisian people to Christianity and established the Archdiocese of Utrecht . However, his successor Boniface was murdered by the Frisians in 754. The Frankish Carolingian empire controlled much of Western Europe. In 843, it was divided into three parts— East , Middle , and West Francia . Most of present-day Netherlands became part of Middle Francia, which
15168-613: The Low Countries from 1384 to 1581. The new rulers defended Dutch trading interests. The fleets of the County of Holland defeated the fleets of the Hanseatic League several times. Amsterdam grew and in the 15th century became the primary trading port in Europe for grain from the Baltic region . Amsterdam distributed grain to the major cities of Belgium, Northern France and England. This trade
15360-523: The Low Countries south of the great rivers. These tribes would eventually develop into the Salian Franks . The Celtic La Tène culture (c. 450 BC to the Roman conquest) expanded over a wide range, including the southern area of the Low Countries . Some scholars have speculated that even a third ethnic identity and language, neither Germanic nor Celtic, survived in the Netherlands until the Roman period,
15552-505: The Meuse. These rivers functioned as a natural barrier between fiefdoms and hence historically created a cultural divide, as is evident in some phonetic traits that are recognisable on either side of what the Dutch call their "Great Rivers" ( de Grote Rivieren ). Another significant branch of the Rhine, the IJssel river, discharges into Lake IJssel , the former Zuiderzee ('southern sea'). Just like
15744-548: The Moon began with the Ranger 4 impactor in 1962. Starting in 1966, the Soviets successfully deployed a number of landers to the Moon which were able to obtain data directly from the Moon's surface; just four months later, Surveyor 1 marked the debut of a successful series of U.S. landers. The Soviet uncrewed missions culminated in the Lunokhod program in the early 1970s, which included
15936-426: The Moon did not continue for long. The Apollo 17 mission in 1972 marked the sixth landing and the most recent human visit. Artemis II is scheduled to complete a crewed flyby of the Moon in 2025, and Artemis III will perform the first lunar landing since Apollo 17 with it scheduled for launch no earlier than 2026. Robotic missions are still pursued vigorously. The exploration of Mars has been an important part of
16128-406: The Moon, entering in a lunar orbit on 3 April 1966. The first crewed landing on another celestial body was performed by Apollo 11 on 20 July 1969, landing on the Moon. There have been a total of six spacecraft with humans landing on the Moon starting from 1969 to the last human landing in 1972. The first interplanetary flyby was the 1961 Venera 1 flyby of Venus , though the 1962 Mariner 2
16320-460: The Moon. Also, probes were sent throughout the known Solar System, and into Solar orbit. Uncrewed spacecraft have been sent into orbit around Saturn, Jupiter, Mars, Venus, and Mercury by the 21st century, and the most distance active spacecraft, Voyager 1 and 2 traveled beyond 100 times the Earth-Sun distance. The instruments were enough though that it is thought they have left the Sun's heliosphere,
16512-502: The Netherlands are Amsterdam , Rotterdam , The Hague and Utrecht . Amsterdam is the country's most populous city and the nominal capital , though the primary national political institutions are located in the Hague. The Netherlands has been a parliamentary constitutional monarchy with a unitary structure since 1848. The country has a tradition of pillarisation (separation of citizens into groups by religion and political beliefs) and
16704-586: The Netherlands to the brink of bankruptcy. However, the Cultivation System was introduced in 1830; in the Dutch East Indies, 20% of village land had to be devoted to government crops for export. The policy brought the Dutch enormous wealth and made the colony self-sufficient. The Netherlands abolished slavery in its colonies in 1863. Enslaved people in Suriname would be fully free only in 1873. The Netherlands remained neutral during World War I, in part because
16896-469: The Netherlands) and upstream Germania Superior . Thus, in the case of the Low Countries and the Netherlands, the geographical location of this lower region is more or less downstream and near the sea, compared to that of the upper region of Germania Superior. The designation 'Low' returned in the 10th-century Duchy of Lower Lorraine , which covered much of the Low Countries. The Dukes of Burgundy used
17088-546: The Netherlands. However, Holland is a region within the Netherlands that consists of the two provinces of North and South Holland . Formerly these were a single province, and earlier the County of Holland , which included parts of present-day Utrecht . The emphasis on Holland during the formation of the Dutch Republic , the Eighty Years' War , and the Anglo-Dutch Wars in the 16th, 17th, and 18th centuries, made Holland
17280-520: The Northern Netherlands in 1839 as the Kingdom of the Netherlands was created by decree), while the personal union between Luxembourg and the Netherlands was severed in 1890, when William III died with no surviving male heirs. Ascendancy laws prevented his daughter Queen Wilhelmina from becoming the next Grand Duchess. The Belgian Revolution and the Java War in the Dutch East Indies brought
17472-700: The Republic, led by William III of Orange and Anthonie Heinsius would regularly clash with France in what some historians have come to call the Forty Years' War . In the Nine Years' War and the War of the Spanish Succession , the Republic was at the centre of anti-French coalitions. The Dutch ultimately successfully defended the Spanish Netherlands , established a barrier there, and their troops proved central to
17664-664: The Silent in driving out Spanish troops and forming a new government for the Netherlands. Don Juan of Austria , the new Spanish governor, was forced to concede initially, but within months returned to active hostilities. The Dutch looked for help from the Protestant Elizabeth I of England, but she initially stood by her commitments to the Spanish in the Treaty of Bristol of 1574. When the next large-scale battle occurred at Gembloux in 1578,
17856-423: The Solar System are accomplished at a cost in energy, which is described by the net change in velocity of the spacecraft, or delta-v . Due to the relatively high delta-v to reach Mercury and its proximity to the Sun, it is difficult to explore and orbits around it are rather unstable. Venus was the first target of interplanetary flyby and lander missions and, despite one of the most hostile surface environments in
18048-539: The Solar System, has had more landers sent to it (nearly all from the Soviet Union) than any other planet in the Solar System. The first flyby was the 1961 Venera 1 , though the 1962 Mariner 2 was the first flyby to successfully return data. Mariner 2 has been followed by several other flybys by multiple space agencies often as part of missions using a Venus flyby to provide a gravitational assist en route to other celestial bodies. In 1967, Venera 4 became
18240-655: The Southwest Netherlands, they were raiding the English Channel . Roman forces pacified the region but did not expel the Franks, who continued to be feared at least until the time of Julian the Apostate (358) when Salian Franks were allowed to settle as foederati in Texandria . After the Roman government in the area collapsed in roughly the year 406, the Franks expanded their territories into numerous kingdoms. By
18432-515: The Spanish forces won easily. In light of the defeat at Gembloux , the southern states of the Seventeen Provinces distanced themselves from the rebels in the north with the 1579 Union of Arras . Opposing them, the northern half of the Seventeen Provinces forged the Union of Utrecht in which they committed to support each other against the Spanish. The Union of Utrecht is seen as the foundation of
18624-524: The Spanish in the Netherlands under the Duke of Parma in a series of largely indecisive actions that tied down significant numbers of Spanish troops and bought time for the Dutch to reorganise their defences. The war continued until 1648, when Spain under King Philip IV recognised the independence of the seven north-western provinces in the Peace of Münster . Parts of the southern provinces became de facto colonies of
18816-522: The Sun's apogee (highest point in the heavens) was mobile, not fixed. Some of the prominent Islamic (mostly Persian and Arab) astronomers who made significant contributions to the science include Al-Battani , Thebit , Abd al-Rahman al-Sufi , Biruni , Abū Ishāq Ibrāhīm al-Zarqālī , Al-Birjandi , and the astronomers of the Maragheh and Samarkand observatories. Astronomers during that time introduced many Arabic names now used for individual stars . It
19008-690: The Sun, beginning with the Apollo Telescope Mount , have been launched and still others have had solar observation as a secondary objective. Parker Solar Probe , launched in 2018, will approach the Sun to within 1/9th the orbit of Mercury. Mercury remains the least explored of the Terrestrial planets . As of May 2013, the Mariner 10 and MESSENGER missions have been the only missions that have made close observations of Mercury. MESSENGER entered orbit around Mercury in March 2011, to further investigate
19200-574: The Sun, the Moon and the stars rotating around it. This is known as the geocentric model of the Universe, or the Ptolemaic system , named after Ptolemy . A particularly important early development was the beginning of mathematical and scientific astronomy, which began among the Babylonians , who laid the foundations for the later astronomical traditions that developed in many other civilizations. The Babylonians discovered that lunar eclipses recurred in
19392-526: The United Arab Emirates. Called the Emirates Mars Mission , it was launched on 19 July 2020 and went into orbit around Mars on 9 February 2021. The uncrewed exploratory probe was named "Hope Probe" and was sent to Mars to study its atmosphere in detail. The Russian space mission Fobos-Grunt , which launched on 9 November 2011, experienced a failure leaving it stranded in low Earth orbit . It
19584-534: The United Provinces consistently possessed one of Europe's largest and most capable armies. However, following the conclusion of the War of the Spanish Succession , other major powers such as Prussia, Austria, Britain, and Russia significantly expanded their military forces. The Republic struggled to match these developments, and gradually assumed the status of a mid-tier power. However, historians have sometimes overstated
19776-521: The age of the Universe and size of the Observable Universe. Theoretical astronomy led to speculations on the existence of objects such as black holes and neutron stars , which have been used to explain such observed phenomena as quasars , pulsars , blazars , and radio galaxies . Physical cosmology made huge advances during the 20th century. In the early 1900s the model of the Big Bang theory
19968-526: The alliance which halted French territorial expansion in Europe until a new cycle began in 1792 with the French Revolutionary Wars . However, the wars left them effectively bankrupt, and inflicted permanent damage on the Dutch merchant navy; while they remained the dominant economic power in the Far East, Britain took over as the pre-eminent global commercial and maritime power. Between 1590 and 1713,
20160-616: The armed support of revolutionary France , Dutch republicans proclaimed the Batavian Republic , modelled after the French Republic and rendering the Netherlands a unitary state on 19 January 1795. The stadtholder William V of Orange had fled to England. From 1806 to 1810, the Kingdom of Holland was set up by Napoleon Bonaparte as a puppet kingdom governed by his brother Louis Bonaparte . However, King Louis Bonaparte tried to serve Dutch interests instead of his brother's, and he
20352-543: The asteroid 4 Vesta , two of the three largest asteroids, were visited by NASA's Dawn spacecraft , launched in 2007. Hayabusa was a robotic spacecraft developed by the Japan Aerospace Exploration Agency to return a sample of material from the small near-Earth asteroid 25143 Itokawa to Earth for further analysis. Hayabusa was launched on 9 May 2003 and rendezvoused with Itokawa in mid-September 2005. After arriving at Itokawa, Hayabusa studied
20544-428: The asteroid's shape, spin, topography, color, composition, density, and history. In November 2005, it landed on the asteroid twice to collect samples. The spacecraft returned to Earth on 13 June 2010. The exploration of Jupiter has consisted solely of a number of automated NASA spacecraft visiting the planet since 1973. A large majority of the missions have been "flybys", in which detailed observations are taken without
20736-486: The atmosphere itself produces significant infrared emission. Consequently, infrared observatories have to be located in high, dry places on Earth or in space. Some molecules radiate strongly in the infrared. This allows the study of the chemistry of space; more specifically it can detect water in comets. Historically, optical astronomy, which has been also called visible light astronomy, is the oldest form of astronomy. Images of observations were originally drawn by hand. In
20928-419: The broader Rosetta mission . Deep space exploration is the branch of astronomy , astronautics and space technology that is involved with the exploration of distant regions of outer space. Physical exploration of space is conducted both by human spaceflights (deep-space astronautics) and by robotic spacecraft . Astronomy Astronomy is a natural science that studies celestial objects and
21120-418: The centuries, the Dutch coastline has changed considerably as a result of natural disasters and human intervention. On 14 December 1287, St. Lucia's flood affected the Netherlands and Germany, killing more than 50,000 people in one of the most destructive floods in recorded history. The St. Elizabeth flood of 1421 and the mismanagement in its aftermath destroyed a newly reclaimed polder , replacing it with
21312-540: The country is for the most part flat, with the exception of foothills in the far southeast, up to a height of no more than 322 m (1,056 ft) at the Vaalserberg , and some low hill ranges in the central parts. Most of the areas below sea level are caused by peat extraction or achieved through land reclamation . Since the late 16th century, large polder areas are preserved through elaborate drainage systems that include dikes , canals and pumping stations. Much of
21504-627: The country was originally formed by the estuaries of three large European rivers: the Rhine ( Rijn ), the Meuse ( Maas ) and the Scheldt ( Schelde ), as well as their tributaries . The south-western part of the Netherlands is a river delta of these rivers, the Rhine–Meuse–Scheldt delta . The European Netherlands is divided into north and south parts by the Rhine, the Waal , its main tributary branch, and
21696-613: The countryside was plundered for food. Although there were thousands of Dutch who risked their lives by hiding Jews from the Germans, over 20,000 Dutch fascists joined the Waffen SS . Political collaborators were members of the fascist NSB , the only legal political party in the occupied Netherlands. On 8 December 1941, the Dutch government-in-exile in London declared war on Japan, but could not prevent
21888-408: The department is historically affiliated with a physics department, and many professional astronomers have physics rather than astronomy degrees. Some titles of the leading scientific journals in this field include The Astronomical Journal , The Astrophysical Journal , and Astronomy & Astrophysics . In early historic times, astronomy only consisted of the observation and predictions of
22080-474: The detection of neutrinos . The vast majority of the neutrinos streaming through the Earth originate from the Sun , but 24 neutrinos were also detected from supernova 1987A . Cosmic rays , which consist of very high energy particles (atomic nuclei) that can decay or be absorbed when they enter the Earth's atmosphere, result in a cascade of secondary particles which can be detected by current observatories. Some future neutrino detectors may also be sensitive to
22272-684: The distinction of being the only object in the Outer Solar System that has been explored with a lander, the Huygens probe deployed by the Cassini spacecraft. The exploration of Uranus has been entirely through the Voyager 2 spacecraft, with no other visits currently planned. Given its axial tilt of 97.77°, with its polar regions exposed to sunlight or darkness for long periods, scientists were not sure what to expect at Uranus. The closest approach to Uranus occurred on 24 January 1986. Voyager 2 studied
22464-583: The end of the Ice Age , the nomadic late Upper Palaeolithic Hamburg culture (13,000–10,000 BC) hunted reindeer in the area, using spears. The later Ahrensburg culture (11,200–9,500 BC) used bow and arrow . From Mesolithic Maglemosian-like tribes (c. 8000 BC), the world's oldest canoe was found in Drenthe . Indigenous late Mesolithic hunter-gatherers from the Swifterbant culture (c. 5600 BC), related to
22656-532: The energy required at launch to reach Jupiter, albeit at the cost of a significantly longer flight duration. Jupiter has 95 known moons , many of which have relatively little known information about them. Saturn has been explored only through uncrewed spacecraft launched by NASA, including one mission ( Cassini–Huygens ) planned and executed in cooperation with other space agencies. These missions consist of flybys in 1979 by Pioneer 11 , in 1980 by Voyager 1 , in 1982 by Voyager 2 and an orbital mission by
22848-463: The extent of this decline, especially when considering the period up to the 1750s. In the 18th century the Dutch Republic had seen a state of a general decline, with economic competition from England and long-standing rivalries between the two main factions in Dutch society, the republican Staatsgezinden and the supporters of the stadtholder the Prinsgezinden as main political factions. With
23040-504: The first human spaceflight ( Yuri Gagarin aboard Vostok 1 ) in 1961, the first spacewalk (by Alexei Leonov ) on 18 March 1965, the first automatic landing on another celestial body in 1966, and the launch of the first space station ( Salyut 1 ) in 1971. After the first 20 years of exploration, focus shifted from one-off flights to renewable hardware, such as the Space Shuttle program , and from competition to cooperation as with
23232-402: The first fully functional telescope of this kind, and a landmark for future developments due to its superior features over the previous Galilean telescope . A string of discoveries in the Solar System (and beyond) followed, then and in the next centuries : the mountains of the Moon , the phases of Venus , the main satellites of Jupiter and Saturn , the rings of Saturn , many comets ,
23424-458: The first of which was Galileo , which flew past two: 951 Gaspra in 1991, followed by 243 Ida in 1993. Both of these lay near enough to Galileo' s planned trajectory to Jupiter that they could be visited at acceptable cost. The first landing on an asteroid was performed by the NEAR Shoemaker probe in 2000, following an orbital survey of the object, 433 Eros . The dwarf planet Ceres and
23616-506: The first probe to enter and directly examine the atmosphere of Venus. In 1970, Venera 7 became the first successful lander to reach the surface of Venus and by 1985 it had been followed by eight additional successful Soviet Venus landers which provided images and other direct surface data. Starting in 1975, with the Soviet orbiter Venera 9 , some ten successful orbiter missions have been sent to Venus, including later missions which were able to map
23808-412: The first uncrewed rovers and also successfully brought lunar soil samples to Earth for study. This marked the first (and to date the only) automated return of extraterrestrial soil samples to Earth. Uncrewed exploration of the Moon continues with various nations periodically deploying lunar orbiters. China's Chang'e 4 in 2019 and Chang'e 6 in 2024 achieved the world's first landing and sample return on
24000-718: The import of goods through the Netherlands proved essential to German survival until the blockade by the British Royal Navy in 1916. That changed in World War II, when Germany invaded the Netherlands on 10 May 1940. The Rotterdam Blitz forced most of the Dutch army to surrender. During the occupation, over 100,000 Dutch Jews were transported to Nazi extermination camps ; only a few survived. Dutch workers were conscripted for forced labour in Germany, civilians who resisted were killed in reprisal for attacks on German soldiers, and
24192-414: The introduction of new technology, including the spectroscope and photography . Joseph von Fraunhofer discovered about 600 bands in the spectrum of the Sun in 1814–15, which, in 1859, Gustav Kirchhoff ascribed to the presence of different elements. Stars were proven to be similar to the Earth's own Sun, but with a wide range of temperatures , masses , and sizes. The existence of the Earth's galaxy,
24384-458: The last largest moon in the system. Data from Voyager 2 supported the view that Neptune's largest moon, Triton , is a captured Kuiper belt object. The dwarf planet Pluto presents significant challenges for spacecraft because of its great distance from Earth (requiring high velocity for reasonable trip times) and small mass (making capture into orbit difficult at present). Voyager 1 could have visited Pluto, but controllers opted instead for
24576-579: The late 19th century and most of the 20th century, images were made using photographic equipment. Modern images are made using digital detectors, particularly using charge-coupled devices (CCDs) and recorded on modern medium. Although visible light itself extends from approximately 4000 Å to 7000 Å (400 nm to 700 nm), that same equipment can be used to observe some near-ultraviolet and near-infrared radiation. Ultraviolet astronomy employs ultraviolet wavelengths between approximately 100 and 3200 Å (10 to 320 nm). Light at those wavelengths
24768-523: The longest ever Soviet planetary surface mission. Venus and Mars are the two planets outside of Earth on which humans have conducted surface missions with uncrewed robotic spacecraft . Salyut 1 was the first space station of any kind, launched into low Earth orbit by the Soviet Union on 19 April 1971. The International Space Station (ISS) is currently the largest and oldest of the 2 current fully functional space stations, inhabited continuously since
24960-463: The lunar surface, and 400,171 km (248,655 mi) from Earth, marking the record for the farthest humans have ever traveled from Earth in 1970. As of 26 November 2022 Voyager 1 was at a distance of 159 AU (23.8 billion km; 14.8 billion mi) from Earth. It is the most distant human-made object from Earth. Starting in the mid-20th century probes and then human missions were sent into Earth orbit, and then on to
25152-576: The making of calendars . Professional astronomy is split into observational and theoretical branches. Observational astronomy is focused on acquiring data from observations of astronomical objects. This data is then analyzed using basic principles of physics. Theoretical astronomy is oriented toward the development of computer or analytical models to describe astronomical objects and phenomena. These two fields complement each other. Theoretical astronomy seeks to explain observational results and observations are used to confirm theoretical results. Astronomy
25344-523: The migration of Germanic tribes from the North. By the time this migration was complete, around 250 BC, a few general cultural and linguistic groups had emerged. The North Sea Germanic Ingaevones inhabited the northern part of the Low Countries . They would later develop into the Frisii and the early Saxons . The Weser–Rhine Germanic (or Istvaeones ) extended along the middle Rhine and Weser and inhabited
25536-450: The modern Netherlands. Spanish troops sacked Maastricht in 1579, killing over 10,000 civilians. In 1581, the northern provinces adopted the Act of Abjuration , the declaration of independence in which the provinces officially deposed Philip II. Against the rebels Philip could draw on the resources of the Spanish Empire . Elizabeth I sympathised with the Dutch struggle and sent an army of 7,600 soldiers to aid them. English forces faced
25728-542: The motions of objects visible to the naked eye. In some locations, early cultures assembled massive artifacts that may have had some astronomical purpose. In addition to their ceremonial uses, these observatories could be employed to determine the seasons, an important factor in knowing when to plant crops and in understanding the length of the year. As civilizations developed, most notably in Egypt , Mesopotamia , Greece , Persia , India , China , and Central America , astronomical observatories were assembled and ideas on
25920-417: The motions of the planets. Newton also developed the reflecting telescope . Improvements in the size and quality of the telescope led to further discoveries. The English astronomer John Flamsteed catalogued over 3000 stars. More extensive star catalogues were produced by Nicolas Louis de Lacaille . The astronomer William Herschel made a detailed catalog of nebulosity and clusters, and in 1781 discovered
26112-406: The nature of the Universe began to develop. Most early astronomy consisted of mapping the positions of the stars and planets, a science now referred to as astrometry . From these observations, early ideas about the motions of the planets were formed, and the nature of the Sun, Moon and the Earth in the Universe were explored philosophically. The Earth was believed to be the center of the Universe with
26304-423: The new republican-mercantile empire. Following the declaration of independence, the provinces of Holland , Zeeland , Groningen , Friesland , Utrecht , Overijssel , and Gelderland entered into a confederation . All these duchies, lordships and counties enjoyed a significant degree of autonomy and was governed by its own administrative body known as the States-Provincial . The confederal government, known as
26496-571: The north (i.e. the southern Netherlands and Flanders), who kept on speaking Old Frankish , which by the ninth century had evolved into Old Low Franconian or Old Dutch. A Dutch-French language boundary hence came into existence. To the north of the Franks, climatic conditions improved, and during the Migration Period Saxons , the closely related Angles , Jutes , and Frisii settled the coast. Many moved on to England and came to be known as Anglo-Saxons , but those who stayed would be referred to as Frisians and their language as Frisian . Frisian
26688-464: The north to create a strong country on the northern border of France. William Frederick raised this United Netherlands to the status of a kingdom and proclaimed himself as King William I in 1815. William became hereditary Grand Duke of Luxembourg in exchange for his German possessions. However, the Southern Netherlands had been culturally separate from the north since 1581, and rebelled . The south gained independence in 1830 as Belgium (recognised by
26880-533: The observation of objects in space, known as astronomy , predates reliable recorded history , it was the development of large and relatively efficient rockets during the mid-twentieth century that allowed physical space exploration to become a reality. Common rationales for exploring space include advancing scientific research, national prestige, uniting different nations, ensuring the future survival of humanity, and developing military and strategic advantages against other countries. The early era of space exploration
27072-403: The observation of young stars embedded in molecular clouds and the cores of galaxies. Observations from the Wide-field Infrared Survey Explorer (WISE) have been particularly effective at unveiling numerous galactic protostars and their host star clusters . With the exception of infrared wavelengths close to visible light, such radiation is heavily absorbed by the atmosphere, or masked, as
27264-431: The observations made by Mariner 10 in 1975 (Munsell, 2006b). A third mission to Mercury, scheduled to arrive in 2025, BepiColombo is to include two probes . BepiColombo is a joint mission between Japan and the European Space Agency . MESSENGER and BepiColombo are intended to gather complementary data to help scientists understand many of the mysteries discovered by Mariner 10's flybys . Flights to other planets within
27456-441: The particles produced when cosmic rays hit the Earth's atmosphere. Gravitational-wave astronomy is an emerging field of astronomy that employs gravitational-wave detectors to collect observational data about distant massive objects. A few observatories have been constructed, such as the Laser Interferometer Gravitational Observatory LIGO . LIGO made its first detection on 14 September 2015, observing gravitational waves from
27648-449: The people", akin to Old Dutch Dietsch or Old English þeodisc , meaning "(of) the common ( Germanic ) people". At first, the English language used Dutch to refer to any or all speakers of West Germanic languages . Gradually its meaning shifted to the West Germanic people they had the most contact with. The oldest human ( Neanderthal ) traces in the Netherlands, believed to be about 250,000 years old, were found near Maastricht . At
27840-497: The planet Uranus , the first new planet found. During the 18–19th centuries, the study of the three-body problem by Leonhard Euler , Alexis Claude Clairaut , and Jean le Rond d'Alembert led to more accurate predictions about the motions of the Moon and planets. This work was further refined by Joseph-Louis Lagrange and Pierre Simon Laplace , allowing the masses of the planets and moons to be estimated from their perturbations. Significant advances in astronomy came about with
28032-426: The planet's unique atmosphere and magnetosphere . Voyager 2 also examined its ring system and the moons of Uranus including all five of the previously known moons, while discovering an additional ten previously unknown moons. Images of Uranus proved to have a uniform appearance, with no evidence of the dramatic storms or atmospheric banding evident on Jupiter and Saturn. Great effort was required to even identify
28224-470: The planets with great accuracy, a field known as celestial mechanics . More recently the tracking of near-Earth objects will allow for predictions of close encounters or potential collisions of the Earth with those objects. The measurement of stellar parallax of nearby stars provides a fundamental baseline in the cosmic distance ladder that is used to measure the scale of the Universe. Parallax measurements of nearby stars provide an absolute baseline for
28416-406: The population into submission. Alba boasted of having executed 18,600; this figure does not include those who perished by war and famine. The first great siege was Alba's effort to capture Haarlem and thereby cut Holland in half. It dragged on from December 1572 to the next summer, when Haarlemers finally surrendered on 13 July upon the promise that the city would be spared from being sacked. It
28608-455: The potential for life to adapt to challenges on Earth and in outer space . Cosmology (from the Greek κόσμος ( kosmos ) "world, universe" and λόγος ( logos ) "word, study" or literally "logic") could be considered the study of the Universe as a whole. Netherlands – in Europe (light green & dark grey) – in the European Union (light green) The Netherlands , informally Holland ,
28800-408: The pre-colonial Middle Ages, but modern discoveries show otherwise. For over six centuries (from the recovery of ancient learning during the late Middle Ages into the Enlightenment), the Roman Catholic Church gave more financial and social support to the study of astronomy than probably all other institutions. Among the Church's motives was finding the date for Easter . Medieval Europe housed
28992-402: The previous, this river forms a linguistic divide: people to the northeast of this river speak Dutch Low Saxon dialects (except for the province of Friesland , which has its own language). The Netherlands is mostly composed of deltaic , coastal and aeolian derived sediments during the Pleistocene glacial and interglacial periods. Almost the entire west Netherlands is composed of
29184-535: The probe landing or entering orbit; such as in Pioneer and Voyager programs. The Galileo and Juno spacecraft are the only spacecraft to have entered the planet's orbit. As Jupiter is believed to have only a relatively small rocky core and no real solid surface, a landing mission is precluded. Reaching Jupiter from Earth requires a delta-v of 9.2 km/s, which is comparable to the 9.7 km/s delta-v needed to reach low Earth orbit. Fortunately, gravity assists through planetary flybys can be used to reduce
29376-458: The properties examined include luminosity , density , temperature , and chemical composition. Because astrophysics is a very broad subject, astrophysicists typically apply many disciplines of physics, including mechanics , electromagnetism , statistical mechanics , thermodynamics , quantum mechanics , relativity , nuclear and particle physics , and atomic and molecular physics . In practice, modern astronomical research often involves
29568-416: The properties of more distant stars, as their properties can be compared. Measurements of the radial velocity and proper motion of stars allow astronomers to plot the movement of these systems through the Milky Way galaxy. Astrometric results are the basis used to calculate the distribution of speculated dark matter in the galaxy. During the 1990s, the measurement of the stellar wobble of nearby stars
29760-459: The question of whether extraterrestrial life exists, and how humans can detect it if it does. The term exobiology is similar. Astrobiology makes use of molecular biology , biophysics , biochemistry , chemistry , astronomy, physical cosmology , exoplanetology and geology to investigate the possibility of life on other worlds and help recognize biospheres that might be different from that on Earth. The origin and early evolution of life
29952-422: The reason NASA was created was as a response to Sputnik I. The launch of the first human-made object to orbit Earth , the Soviet Union's Sputnik 1 , on 4 October 1957, and the first Moon landing by the American Apollo 11 mission on 20 July 1969 are often taken as landmarks for this initial period. The Soviet space program achieved many of the first milestones, including the first living being in orbit in 1957,
30144-473: The region called the Low Countries (Netherlands, Belgium , and Luxembourg ) all have comparatively the same toponymy . Place names with Neder , Nieder , Nedre , Nether , Lage(r) or Low(er) (in Germanic languages ) and Bas or Inferior (in Romance languages ) are in use in low-lying places all over Europe. The Romans made a distinction between the Roman provinces of downstream Germania Inferior (nowadays part of Belgium and
30336-491: The rivers Rhine and Meuse ) to refer to the Northern Dutch (Dutch living North of these rivers). In the Southern province of Limburg, the term is used for the Dutch from the other 11 provinces. The use of the term in this context by the Southern Dutch is in a derogatory fashion. Dutch is used as the adjective for the Netherlands, as well as the demonym . The origins of the word go back to Proto-Germanic *þiudiskaz , Latinised into Theodiscus , meaning "popular" or "of
30528-425: The rotation of the Earth, furthermore, Buridan also developed the theory of impetus (predecessor of the modern scientific theory of inertia ) which was able to show planets were capable of motion without the intervention of angels. Georg von Peuerbach (1423–1461) and Regiomontanus (1436–1476) helped make astronomical progress instrumental to Copernicus's development of the heliocentric model decades later. During
30720-414: The satellite was not punctured by a meteoroid . Sputnik 1 was launched by an R-7 rocket. It burned up upon re-entry on 3 January 1958. The first successful human spaceflight was Vostok 1 ("East 1"), carrying the 27-year-old Russian cosmonaut , Yuri Gagarin , on 12 April 1961. The spacecraft completed one orbit around the globe, lasting about 1 hour and 48 minutes. Gagarin's flight resonated around
30912-428: The sole visit to the system as of 2024. The possibility of a Neptune Orbiter has been discussed, but no other missions have been given serious thought. Although the extremely uniform appearance of Uranus during Voyager 2 ' s visit in 1986 had led to expectations that Neptune would also have few visible atmospheric phenomena, the spacecraft found that Neptune had obvious banding, visible clouds, auroras , and even
31104-405: The southern Scandinavian Ertebølle culture , were strongly linked to rivers and open water. Between 4800 and 4500 BC, the Swifterbant people started to adopt from the neighbouring Linear Pottery culture the practice of animal husbandry , and between 4300 and 4000 BC agriculture. The Funnelbeaker culture (4300–2800 BC) erected the dolmens , large stone grave monuments found in Drenthe . There
31296-436: The space exploration programs of the Soviet Union (later Russia), the United States, Europe, Japan and India. Dozens of robotic spacecraft , including orbiters , landers , and rovers , have been launched toward Mars since the 1960s. These missions were aimed at gathering data about current conditions and answering questions about the history of Mars. The questions raised by the scientific community are expected to not only give
31488-436: The stars" depending on the translation). Astronomy should not be confused with astrology , the belief system which claims that human affairs are correlated with the positions of celestial objects. Although the two fields share a common origin, they are now entirely distinct. "Astronomy" and " astrophysics " are synonyms. Based on strict dictionary definitions, "astronomy" refers to "the study of objects and matter outside
31680-477: The subject, whereas "astrophysics" is used to describe the physics-oriented version of the subject. However, since most modern astronomical research deals with subjects related to physics, modern astronomy could actually be called astrophysics. Some fields, such as astrometry , are purely astronomy rather than also astrophysics. Various departments in which scientists carry out research on this subject may use "astronomy" and "astrophysics", partly depending on whether
31872-664: The surface of Venus using radar to pierce the obscuring atmosphere. Space exploration has been used as a tool to understand Earth as a celestial object. Orbital missions can provide data for Earth that can be difficult or impossible to obtain from a purely ground-based point of reference. For example, the existence of the Van Allen radiation belts was unknown until their discovery by the United States' first artificial satellite, Explorer 1 . These belts contain radiation trapped by Earth's magnetic fields, which currently renders construction of habitable space stations above 1000 km impractical. Following this early unexpected discovery,
32064-419: The term les pays de par deçà ("the lands over here") for the Low Countries. Under Habsburg rule , this became pays d'embas ("lands down-here"). This was translated as Neder-landen in contemporary Dutch official documents. From a regional point of view, Niderlant was also the area between the Meuse and the lower Rhine in the late Middle Ages. From the mid-sixteenth century, the "Low Countries" and
32256-422: The universe consists of a multitude of galaxies. With this Hubble formulated the Hubble constant , which allowed for the first time a calculation of the age of the Universe and size of the Observable Universe, which became increasingly precise with better meassurements, starting at 2 billion years and 280 million light-years, until 2006 when data of the Hubble Space Telescope allowed a very accurate calculation of
32448-409: The universe; origin of cosmic rays ; general relativity and physical cosmology , including string cosmology and astroparticle physics . Astrochemistry is the study of the abundance and reactions of molecules in the Universe , and their interaction with radiation . The discipline is an overlap of astronomy and chemistry . The word "astrochemistry" may be applied to both the Solar System and
32640-409: The wealthiest trading city in Amsterdam , and the first full-time stock exchange . The inventiveness of the traders led to insurance and retirement funds as well as phenomena such as the boom-bust cycle , the world's first asset-inflation bubble , the tulip mania of 1636–1637, and the world's first bear raider , Isaac le Maire . In 1672 – known in Dutch history as the Rampjaar (Disaster Year) –
32832-559: The world. With a population of over 18 million people, all living within a total area of 41,850 km (16,160 sq mi)—of which the land area is 33,500 km (12,900 sq mi)—the Netherlands is the 33rd most densely populated country, with a density of 535 people per square kilometre (1,390 people/sq mi). Nevertheless, it is the world's second-largest exporter of food and agricultural products by value, owing to its fertile soil , mild climate, intensive agriculture , and inventiveness . The four largest cities in
33024-421: The world; it was a demonstration of the advanced Soviet space program and it opened an entirely new era in space exploration: human spaceflight . The first artificial object to reach another celestial body was Luna 2 reaching the Moon in 1959. The first soft landing on another celestial body was performed by Luna 9 landing on the Moon on 3 February 1966. Luna 10 became the first artificial satellite of
33216-432: The year 2000. The other, Tiangong space station built by China, is now fully crewed and operational. Voyager 1 became the first human-made object to leave the Solar System into interstellar space on 25 August 2012. The probe passed the heliopause at 121 AU to enter interstellar space . The Apollo 13 flight passed the far side of the Moon at an altitude of 254 kilometers (158 miles; 137 nautical miles) above
33408-438: Was Gerolf of Holland , who assumed lordship in Frisia, and Viking rule came to an end. The Holy Roman Empire ruled much of the Low Countries in the 10th and 11th century but was not able to maintain political unity. Powerful local nobles turned their cities, counties and duchies into private kingdoms that felt little sense of obligation to the emperor. Holland , Hainaut , Flanders , Gelre , Brabant , and Utrecht were in
33600-640: Was used to detect large extrasolar planets orbiting those stars. Theoretical astronomers use several tools including analytical models and computational numerical simulations ; each has its particular advantages. Analytical models of a process are better for giving broader insight into the heart of what is going on. Numerical models reveal the existence of phenomena and effects otherwise unobserved. Theorists in astronomy endeavor to create theoretical models that are based on existing observations and known physics, and to predict observational consequences of those models. The observation of phenomena predicted by
33792-562: Was a quick transition from the Funnelbeaker farming culture to the pan-European Corded Ware pastoralist culture (c. 2950 BC). In the southwest, the Seine-Oise-Marne culture —related to the Vlaardingen culture (c. 2600 BC)—survived well into the Neolithic period, until it too was succeeded by the Corded Ware culture. The subsequent Bell Beaker culture (2700–2100 BC) introduced metalwork in copper, gold and later bronze and opened new international trade routes, reflected in copper artefacts . Finds of rare bronze objects suggest that Drenthe
33984-516: Was a stipulation Don Fadrique was unable to honour, when his soldiers mutinied, angered over pay owed and the miserable conditions of the campaign. On 4 November 1576, Spanish tercios seized Antwerp and subjected it to the worst pillage in the Netherlands' history. The citizens resisted but were overcome; seven thousand were killed and a thousand buildings were torched. Following the sack of Antwerp , delegates from Catholic Brabant, Protestant Holland and Zeeland agreed to join Utrecht and William
34176-433: Was a trading centre in the Bronze Age (2000–800 BC). The Bell Beaker culture developed locally into the Barbed-Wire Beaker culture (2100–1800 BC) and later the Elp culture (1800–800 BC), a Middle Bronze Age culture marked by earthenware pottery. The southern region became dominated by the related Hilversum culture (1800–800 BC). From 800 BC onwards, the Iron Age Celtic Hallstatt culture became influential, replacing
34368-526: Was a vertical test launch. Although the rocket reached space, it did not reach orbital velocity , and therefore returned to Earth in an impact, becoming the first sub-orbital spaceflight . In 1949, the Bumper-WAC reached an altitude of 393 kilometres (244 mi), becoming the first human-made object to enter space, according to NASA . The first successful orbital launch was of the Soviet uncrewed Sputnik 1 ("Satellite 1") mission on 4 October 1957. The satellite weighed about 83 kg (183 lb), and
34560-500: Was a weak kingdom and subject to numerous partitions and annexation attempts by its stronger neighbours. It comprised territories from Frisia in the north to the Kingdom of Italy in the south. Around 850, Lothair I of Middle Francia acknowledged the Viking Rorik of Dorestad as ruler of most of Frisia. When the kingdom of Middle Francia was partitioned in 855, the lands north of the Alps passed to Lothair II and subsequently were named Lotharingia . After he died in 869, Lotharingia
34752-412: Was an early analog computer designed to calculate the location of the Sun , Moon , and planets for a given date. Technological artifacts of similar complexity did not reappear until the 14th century, when mechanical astronomical clocks appeared in Europe. Astronomy flourished in the Islamic world and other parts of the world. This led to the emergence of the first astronomical observatories in
34944-411: Was driven by a " Space Race " between the Soviet Union and the United States . A driving force of the start of space exploration was during the Cold War. After the ability to create nuclear weapons, the narrative of defense/offense left land and the power to control the air the focus. Both the Soviet Union and the U.S. were racing to prove their superiority in technology through exploring space. In fact,
35136-405: Was forced to abdicate on 1 July 1810. The Emperor sent in an army and the Netherlands became part of the French Empire until November 1813, when Napoleon was defeated in the Battle of Leipzig . William Frederick , son of the last stadtholder, returned to the Netherlands in 1813 and proclaimed himself Sovereign Prince . Two years later, the Congress of Vienna added the southern Netherlands to
35328-486: Was formulated, heavily evidenced by cosmic microwave background radiation , Hubble's law , and the cosmological abundances of elements . Space telescopes have enabled measurements in parts of the electromagnetic spectrum normally blocked or blurred by the atmosphere. In February 2016, it was revealed that the LIGO project had detected evidence of gravitational waves in the previous September. The main source of information about celestial bodies and other objects
35520-483: Was fought over in the Hook and Cod Wars between 1350 and 1490. The Cod faction consisted of the more progressive cities, while the Hook faction consisted of the conservative noblemen. These noblemen invited Duke Philip the Good of Burgundy to conquer Holland. Most of the Imperial and French fiefs in what is now the Netherlands and Belgium were united in a personal union by Philip the Good in 1433. The House of Valois-Burgundy and their Habsburg heirs would rule
35712-453: Was partitioned, into Upper and Lower Lotharingia , the latter comprising the Low Countries that became part of East Francia in 870. Around 879, another Viking expedition led by Godfrid, Duke of Frisia , raided the Frisian lands. Resistance to the Vikings, if any, came from local nobles, who gained in stature as a result, and that laid the basis for the disintegration of Lower Lotharingia into semi-independent states. One of these local nobles
35904-399: Was spoken along the entire southern North Sea coast. By the seventh century, a Frisian Kingdom (650–734) under King Aldegisel and King Redbad emerged with Traiectum ( Utrecht ) as its centre of power, while Dorestad was a flourishing trading place. Between 600 and around 719 the cities were often fought over between the Frisians and the Franks. In 734, at the Battle of the Boarn ,
36096-399: Was the first celestial body to be the object of space exploration. It holds the distinctions of being the first remote celestial object to be flown by, orbited, and landed upon by spacecraft, and the only remote celestial object ever to be visited by humans. In 1959, the Soviets obtained the first images of the far side of the Moon , never previously visible to humans. The U.S. exploration of
36288-435: Was the first flyby of Venus to return data (closest approach 34,773 kilometers). Pioneer 6 was the first satellite to orbit the Sun , launched on 16 December 1965. The other planets were first flown by in 1965 for Mars by Mariner 4 , 1973 for Jupiter by Pioneer 10 , 1974 for Mercury by Mariner 10 , 1979 for Saturn by Pioneer 11 , 1986 for Uranus by Voyager 2 , 1989 for Neptune by Voyager 2 . In 2015,
36480-431: Was the first to return images from the surface of another planet, returning images from Venus. In 1971, the Mars 3 mission achieved the first soft landing on Mars returning data for almost 20 seconds. Later, much longer duration surface missions were achieved, including over six years of Mars surface operation by Viking 1 from 1975 to 1982 and over two hours of transmission from the surface of Venus by Venera 13 in 1982,
36672-431: Was to begin exploration of the Phobos and Martian circumterrestrial orbit, and study whether the moons of Mars, or at least Phobos, could be a "trans-shipment point" for spaceships traveling to Mars. Until the advent of space travel , objects in the asteroid belt were merely pinpricks of light in even the largest telescopes, their shapes and terrain remaining a mystery. Several asteroids have now been visited by probes,
36864-443: Was vital because Holland could no longer produce enough grain to feed itself. Land drainage had caused the peat of the former wetlands to reduce to a level that was too low for drainage to be maintained. Under Habsburg Charles V , all fiefs in the current Netherlands region were united into the Seventeen Provinces , which included most of present-day Belgium, Luxembourg, and parts of France and Germany. In 1568, under Phillip II,
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