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145-506: The first U.S. astronaut candidates were selected by NASA in 1959, for its Project Mercury with the objective of orbiting astronauts around the Earth in single-man capsules. The military services were asked to provide a list of military test pilots who met specific qualifications. After stringent screening, NASA announced its selection of the " Mercury Seven " as its first astronauts. Since then, NASA has selected 22 more groups of astronauts, opening

290-586: A Scout rocket attempted to launch a specialized satellite equipped with Mercury communications components for testing the ground tracking network, but the booster failed soon after liftoff. The Little Joe program used seven airframes for eight flights, of which three were successful. The second Little Joe flight was named Little Joe 6, because it was inserted into the program after the first 5 airframes had been allocated. Production spacecraft and boilerplates were used for these test flights. Johnson Space Center The Lyndon B. Johnson Space Center ( JSC )

435-487: A launch escape system to separate the spacecraft and its occupant from the launch vehicle in case of impending failure; attitude control for orientation of the spacecraft in orbit; a retrorocket system to bring the spacecraft out of orbit; drag braking blunt body for atmospheric reentry ; and landing on water. To communicate with the spacecraft during an orbital mission, an extensive communications network had to be built. In keeping with his desire to keep from giving

580-485: A 15-hour hold, during which pyrotechnics were installed. Then came the main countdown which for orbital flights started 6½ hours before launch (T – 390 min), counted backwards to launch (T = 0) and then forward until orbital insertion (T + 5 min). On an orbital mission, the Atlas' rocket engines were ignited four seconds before lift-off. The launch vehicle was held to the ground by clamps and then released when sufficient thrust

725-573: A Senate resolution renaming the Manned Spacecraft Center in his honor. As  Senate Majority Leader , Johnson had sponsored the 1958 legislation which created NASA ; dedication ceremonies were held six months later on August 27. One of the artifacts displayed at Johnson Space Center is the Saturn V rocket. It is whole, except for the ring between the S-IC and S-II stages, and the fairing between

870-489: A blunt, forward-facing heat shield could solve the problem of heating. T. Keith Glennan had been appointed the first Administrator of NASA, with Hugh L. Dryden (last Director of NACA) as his Deputy, at the creation of the agency on October 1, 1958. Glennan would report to the president through the National Aeronautics and Space Council . The group responsible for Project Mercury was NASA's Space Task Group , and

1015-558: A centrifuge at the Naval Air Development Center , and were taught special breathing techniques necessary when subjected to more than 6 g. Weightlessness training took place in aircraft, first on the rear seat of a two-seater fighter and later inside converted and padded cargo aircraft . They practiced gaining control of a spinning spacecraft in a machine at the Lewis Flight Propulsion Laboratory called

1160-451: A college degree in a STEM subject. The college degree requirement excluded the USAF's X-1 pilot, then-Lt Col (later Brig Gen) Chuck Yeager , the first person to exceed the speed of sound . He later became a critic of the project, ridiculing the civilian space program, labeling astronauts as "spam in a can." John Glenn did not have a college degree either, but used influential friends to make

1305-432: A convex base, which carried a heat shield (Item 2 in the diagram below) consisting of an aluminum honeycomb covered with multiple layers of fiberglass . Strapped to it was a retropack ( 1 ) consisting of three rockets deployed to brake the spacecraft during reentry. Between these were three posigrade rockets: minor rockets for separating the spacecraft from the launch vehicle at orbital insertion. The straps that held

1450-439: A crewed spacecraft clears its launch tower until it lands back on Earth, it is in the hands of Mission Control. The MCC houses several Flight Control Rooms, from which flight controllers coordinate and monitor the spaceflights. The rooms have many computer resources to monitor, command, and communicate with spacecraft. When a mission is underway, the rooms are staffed around the clock, usually in three shifts. JSC handles most of

1595-448: A cuff that could take his blood pressure, and a rectal thermometer to record his temperature (this was replaced by an oral thermometer on the last flight). Data from these was sent to the ground during the flight. The astronaut normally drank water and ate food pellets. Despite the lessons learnt from the U2 program, which also utilized a pressure suit, initially no urine collection device

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1740-576: A day-long, 22 orbit flight. However, the Soviet Union ended its Vostok program the next month, with the human spaceflight endurance record set by the 82-orbit, almost 5-day Vostok 5 flight. All of the six crewed Mercury flights were successful, though some planned flights were canceled during the project (see below). The main medical problems encountered were simple personal hygiene , and post-flight symptoms of low blood pressure . The launch vehicles had been tested through uncrewed flights, therefore

1885-534: A delegation which exerted particularly strong political pressure, prompting a personal inquiry to Webb from President Kennedy. Senators and congressmen from sites in Missouri and California similarly lobbied the selection team. Proponents of sites in Boston, Massachusetts, Rhode Island, and Norfolk, Virginia, went so far as to make separate presentations to Webb and the headquarters staff, so Webb added these additional sites to

2030-565: A dog into orbit. Though the animal was not recovered alive, it was obvious their goal was human spaceflight. Unable to disclose details of military space projects, President Eisenhower ordered the creation of a civilian space agency in charge of civilian and scientific space exploration. Based on the federal research agency National Advisory Committee for Aeronautics (NACA), it was named the National Aeronautics and Space Administration (NASA). The agency achieved its first goal of launching

2175-436: A fuel. For orientation, the pilot could look through the window in front of him or he could look at a screen connected to a periscope with a camera which could be turned 360°. The Mercury astronauts had taken part in the development of their spacecraft, and insisted that manual control, and a window, be elements of its design. As a result, spacecraft movement and other functions could be controlled three ways: remotely from

2320-756: A full staff of technical personnel around solely to fly a few Mercury capsules would result in excessively high costs. Orbital missions required use of the Atlas LV-3B , a man-rated version of the Atlas D which was originally developed as the United States ' first operational intercontinental ballistic missile (ICBM) by Convair for the Air Force during the mid-1950s. The Atlas was a "one-and-one-half-stage" rocket fueled by kerosene and liquid oxygen (LOX). The rocket by itself stood 67 feet (20 m) high; total height of

2465-561: A jet pilot, and Kulin resigned in August 2018 for unspecified personal reasons. Another astronaut candidate, Stephen Thorne , died in an airplane accident before he could finish astronaut training. Selection as an astronaut candidate and subsequent promotion to astronaut does not guarantee the individual will eventually fly in space. Some have voluntarily resigned or been medically disqualified after becoming astronauts before being selected for flights. Civilian candidates are expected to remain with

2610-507: A liquid-fueled engine that burned alcohol and liquid oxygen producing about 75,000 pounds-force (330 kN) of thrust, which was not enough for orbital missions. It was a descendant of the German V-2 , and developed for the U.S. Army during the early 1950s. It was modified for Project Mercury by removing the warhead and adding a collar for supporting the spacecraft together with material for damping vibrations during launch. Its rocket motor

2755-436: A low pressure of 5.5 psi or 38 kPa (equivalent to an altitude of 24,800 feet or 7,600 metres) was chosen, rather than one with the same composition as air ( nitrogen /oxygen) at sea level. This was easier to control, avoided the risk of decompression sickness ("the bends"), and also saved on spacecraft weight. Fires (which never occurred during the course of Project Mercury) would have to be extinguished by emptying

2900-441: A memorial service honoring the astronauts. It was attended by 6,000 NASA employees and 4,000 guests, as well as by the families of the crew. During the ceremony, an Air Force band led the singing of "God Bless America" as NASA T-38 Talon supersonic jets flew directly over the scene in the traditional missing-man formation . All activities were broadcast live by the national television and radio networks. A similar memorial service

3045-549: A missile race. The rocket technology in turn enabled both sides to develop Earth-orbiting satellites for communications, and gathering weather data and intelligence . Americans were shocked when the Soviet Union placed the first satellite into orbit in October 1957, leading to a growing fear that the US was falling into a " missile gap ". A month later, the Soviets launched Sputnik 2 , carrying

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3190-514: A new site be chosen. Later that year, when President John F. Kennedy set the goal to put a person on the Moon by the end of the decade, it became clear Gilruth would need a larger organization to lead the Apollo Program , with new test facilities and research laboratories. In 1961, Congress held hearings and passed a $ 1.7 billion 1962 NASA appropriations bill which included $ 60 million for

3335-400: A rocket sled track at Holloman Air Force Base at Alamogordo, New Mexico were used for aerodynamic studies. Both Navy and Air Force aircraft were made available for the development of the spacecraft's landing system, and Navy ships and Navy and Marine Corps helicopters were made available for recovery. South of Cape Canaveral the town of Cocoa Beach boomed. From here, 75,000 people watched

3480-926: A satellite into space, the Pioneer 1 , in 1958. The next goal was to put a man there. The limit of space (also known as the Kármán line ) was defined at the time as a minimum altitude of 62 mi (100 km), and the only way to reach it was by using rocket-powered boosters. This created risks for the pilot, including explosion, high g-forces and vibrations during lift off through a dense atmosphere, and temperatures of more than 10,000 °F (5,500 °C) from air compression during reentry. In space, pilots would require pressurized chambers or space suits to supply fresh air. While there, they would experience weightlessness , which could potentially cause disorientation. Further potential risks included radiation and micrometeoroid strikes, both of which would normally be absorbed in

3625-571: A spaceflight, and was consequently dropped. The heat shield and the stability of the spacecraft were tested in wind tunnels , and later in flight. The launch escape system was developed through uncrewed flights. During a period of problems with development of the landing parachutes, alternative landing systems such as the Rogallo glider wing were considered, but ultimately scrapped. The spacecraft were produced at McDonnell Aircraft , St. Louis , Missouri, in clean rooms and tested in vacuum chambers at

3770-869: A swimming test. EVA training is conducted at the Sonny Carter Training Facility . Candidates are also trained to deal with emergencies associated with hyperbaric and hypobaric atmospheric pressures and are given exposure to the microgravity of space flight. Candidates maintain their flying proficiency by flying 15 hours per month in NASA's fleet of T-38 jets based at nearby Ellington Field. Johnson Space Center leads NASA's human spaceflight-related scientific and medical research programs. Technologies developed for spaceflight are now in use in many areas of medicine , energy , transportation , agriculture , communications , and electronics . The Astromaterials Research and Exploration Science (ARES) office performs

3915-613: Is NASA 's center for human spaceflight in Houston , Texas (originally named the Manned Spacecraft Center ), where human spaceflight training, research, and flight control are conducted. It was renamed in honor of the late U.S. president and Texas native, Lyndon B. Johnson , by an act of the United States Senate on February 19, 1973. JSC consists of a complex of 100 buildings constructed on 1,620 acres (660 ha) in

4060-565: Is desirable and may be substituted for experience, such as a doctoral degree (which counts as the two years experience). Teaching experience, including experience at the K–12 levels, is considered to be qualifying experience. Candidates must have the ability to pass the NASA long-duration space flight physical, which includes the following specific requirements: As of October 2024, the corps has 47 "active" astronauts consisting of 20 women and 27 men The highest number of active astronauts at one time

4205-577: Is home to Christopher C. Kraft Jr. Mission Control Center (MCC-H), the NASA control center that coordinates and monitors all human spaceflight for the United States. MCC-H directed all Space Shuttle missions, and currently directs American activities aboard the International Space Station . The Apollo Mission Control Center , a National Historic Landmark , is in Building 30. From the moment

4350-678: Is popularly known by its radio call signs "Mission Control" and "Houston". The original Manned Spacecraft Center grew out of the Space Task Group (STG) headed by Robert R. Gilruth that was formed to coordinate the U.S. crewed spaceflight program. The STG was based at the Langley Research Center in Hampton, Virginia , but reported organizationally to the Goddard Space Flight Center just outside Washington, D.C. To meet

4495-528: The Clear Lake Area of Houston . The center is home to NASA's astronaut corps , and is responsible for training astronauts from both the U.S. and its international partners. It also houses the Christopher C. Kraft Jr. Mission Control Center , which has provided the flight control function for every NASA human spaceflight since Gemini 4 (including Apollo , Skylab , Apollo–Soyuz , and Space Shuttle ). It

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4640-561: The Freedom 7 capsule demonstrated the ability to withstand the high g-forces of launch and atmospheric re-entry . Shepard later went on to fly in the Apollo program and became the only Mercury astronaut to walk on the Moon on Apollo 14 . Gus Grissom became the second American in space on Mercury-Redstone 4 on July 21, 1961. After the splashdown of Liberty Bell 7 , the side hatch opened and caused

4785-527: The Gemini and Apollo programs . Another was killed in a 1967 automobile accident, and another died in a 1991 commercial airliner crash while traveling on NASA business. Two members of the corps have been involuntarily dismissed: Lisa Nowak and William Oefelein . Both were returned to service with the US Navy . [REDACTED]  This article incorporates public domain material from websites or documents of

4930-558: The Human Space Flight Programs . Johnson Space Center was granted a five-year, $ 120-million extension of its agreement with the National Space Biomedical Research Institute at Baylor College of Medicine to study the health risks related to long-duration space flight. The extension will allow a continuation of biomedical research in support of a long-term human presence in space started by

5075-556: The Mercury Control Center located at the Cape Canaveral Air Force Station launch center would become inadequate to control missions with maneuverable spacecraft such as Gemini and Apollo. Christopher Kraft and three other flight controllers began studying what was needed for an improved control center, and directed a study contract awarded to Philco 's Western Development Laboratory. Philco bid on and won

5220-464: The Mission Control Center . Recovery was practiced in pools at Langley , and later at sea with frogmen and helicopter crews. A Redstone rocket was used to boost the capsule for 2 minutes and 30 seconds to an altitude of 32 nautical miles (59 km); the capsule continued ascending on a ballistic curve after booster separation. The launch escape system was jettisoned at the same time. At

5365-852: The National Aeronautics and Space Administration . Project Mercury Project Mercury was the first human spaceflight program of the United States, running from 1958 through 1963. An early highlight of the Space Race , its goal was to put a man into Earth orbit and return him safely, ideally before the Soviet Union . Taken over from the US Air Force by the newly created civilian space agency NASA , it conducted 20 uncrewed developmental flights (some using animals), and six successful flights by astronauts . The program, which took its name from Roman mythology , cost $ 2.68 billion (adjusted for inflation ). The astronauts were collectively known as

5510-597: The Redstone and Atlas D missiles. The capsule was fitted with a launch escape rocket to carry it safely away from the launch vehicle in case of a failure. The flight was designed to be controlled from the ground via the Manned Space Flight Network , a system of tracking and communications stations; back-up controls were outfitted on board. Small retrorockets were used to bring the spacecraft out of its orbit, after which an ablative heat shield protected it from

5655-499: The physical science research at the center. ARES directs and manages all functions and activities of the ARES scientists who perform basic research in earth , planetary , and space sciences . ARES scientists and engineers provide support to the human and robotic spaceflight programs. The responsibilities of ARES also include interaction with the Office of Safety and Mission Assurance and

5800-592: The " Mercury Seven ", and each spacecraft was given a name ending with a "7" by its pilot. The Space Race began with the 1957 launch of the Soviet satellite Sputnik 1 . This came as a shock to the American public, and led to the creation of NASA to expedite existing US space exploration efforts, and place most of them under civilian control. After the successful launch of the Explorer 1 satellite in 1958, crewed spaceflight became

5945-581: The "Original Seven", 339 candidates have been selected to date. The Astronaut Corps is based at the Lyndon B. Johnson Space Center in Houston , although members may be assigned to other locations based on mission requirements, e.g. Soyuz training at Star City, Russia. The Chief of the Astronaut Office is the most senior leadership position for active astronauts in the Corps. The Chief Astronaut serves as head of

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6090-517: The Apollo program, but Kennedy also made reference to the new Center: What was once the furthest outpost on the old frontier of the West will be the furthest outpost on the new frontier of science and space. Houston, ... with its Manned Spacecraft Center, will become the heart of a large scientific and engineering community. During the next 5 years the National Aeronautics and Space Administration expects to double

6235-487: The Atlas-Mercury space vehicle at launch was 95 feet (29 m). The Atlas first stage was a booster skirt with two engines burning liquid fuel. This, together with the larger sustainer second stage, gave it sufficient power to launch a Mercury spacecraft into orbit. Both stages fired from lift-off with the thrust from the second stage sustainer engine passing through an opening in the first stage. After separation from

6380-585: The Corps and is the principal adviser to the NASA Administrator on astronaut training and operations. The first Chief Astronaut was Deke Slayton , appointed in 1962. The current Chief Astronaut is Joe Acaba . Salaries for newly hired civilian astronauts are based on the federal government's General Schedule pay scale for grades GS-11 through GS-14. The astronaut's grade is based on the astronaut's academic achievements and experience. Astronauts can be promoted up to grade GS-15. As of 2015, astronauts based at

6525-486: The Earth. Here the spacecraft fired the three posigrade rockets for a second to separate it from the launch vehicle. Just before orbital insertion and sustainer engine cutoff, g-loads peaked at 8 g (6 g for a suborbital flight). In orbit, the spacecraft automatically turned 180°, pointed the retropackage forward and its nose 14.5° downward and kept this attitude for the rest of the orbital phase to facilitate communication with

6670-516: The Earth. When Mercury ended in May 1963, both nations had sent six people into space, but the Soviets led the US in total time spent in space. The Mercury space capsule was produced by McDonnell Aircraft , and carried supplies of water, food and oxygen for about one day in a pressurized cabin . Mercury flights were launched from Cape Canaveral Air Force Station in Florida, on launch vehicles modified from

6815-739: The Greek Atlas and Roman Jupiter for the SM-65 and PGM-19 missiles . It absorbed military projects with the same aim, such as the Air Force Man in Space Soonest . Following the end of World War II , a nuclear arms race evolved between the US and the Soviet Union (USSR). Since the USSR did not have bases in the western hemisphere from which to deploy bomber planes , Joseph Stalin decided to develop intercontinental ballistic missiles , which drove

6960-785: The House Appropriations Committee, Bob Casey and Olin E. Teague were members of the House Committee on Science and Astronautics, and Teague headed the Subcommittee on Manned Space Flight. Finally, Sam Rayburn was Speaker of the House of Representatives." The land for the new facility was 1,000 acres (400 ha) donated to Rice by the Humble Oil company, situated in an undeveloped area 25 mi (40 km) southeast of Houston adjacent to Clear Lake near Galveston Bay . At

7105-637: The Johnson Space Center in Houston, Texas, earn between $ 66,026 (GS-11 step 1) and $ 158,700 (GS-15 step 8 and above). As of the new astronaut candidate class announcement of 2024, astronaut candidates will be removed from the GS pay scale and be paid on an AD 'Administratively Determined" scale. Military astronauts are detailed to the Johnson Space Center and remain on active duty for pay, benefits, leave, and similar military matters. There are no age restrictions for

7250-536: The McDonnell plant. The spacecraft had close to 600 subcontractors, such as Garrett AiResearch which built the spacecraft's environmental control system. Final quality control and preparations of the spacecraft were made at Hangar S at Cape Canaveral. NASA ordered 20 production spacecraft, numbered 1 through 20. Five of the 20, Nos. 10, 12, 15, 17, and 19, were not flown. Spacecraft No. 3 and No. 4 were destroyed during uncrewed test flights. Spacecraft No. 11 sank and

7395-547: The Mercury spacecraft on a $ 20 million ($ 209 million adjusted for inflation) contract. In January 1959, McDonnell Aircraft Corporation was chosen to be prime contractor for the spacecraft. Two weeks earlier, North American Aviation , based in Los Angeles, was awarded a contract for Little Joe , a small rocket to be used for development of the launch escape system. The World Wide Tracking Network for communication between

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7540-480: The Multi-Axis Spin-Test Inertia Facility (MASTIF), by using an attitude controller handle simulating the one in the spacecraft. A further measure for finding the right attitude in orbit was star and Earth recognition training in planetaria and simulators. Communication and flight procedures were practiced in flight simulators, first together with a single person assisting them and later with

7685-689: The NASA Astronaut Corps and are currently undergoing a candidacy training program at the Johnson Space Center . The most recent class of astronaut candidates was selected in 2021. Only three astronaut candidates have resigned before completing training: Brian O'Leary and Anthony Llewellyn , both from the 1967 Selection Group, and Robb Kulin of the 2017 group. O'Leary resigned in April 1968 after additional Apollo missions were cancelled, Llewellyn resigned in August 1968 after failing to qualify as

7830-659: The NASA Astronaut Corps. Astronaut candidates have ranged between the ages of 26 and 46, with the average age being 34. Candidates must be U.S. citizens to apply for the program. There are three broad categories of qualifications: education, work experience, and medical. Candidates must have a master's degree from an accredited institution in engineering , biological science , physical science or mathematics . The degree must be followed by at least two to three years of related, progressively responsible, professional experience (graduate work or studies) or at least 1,000 hours of pilot-in-command time in jet aircraft. An advanced degree

7975-540: The Redstone Arsenal in Huntsville, was considered as well for intermediate Mercury suborbital flights at a higher speed and altitude than Redstone, but this plan was dropped when it turned out that man-rating Jupiter for the Mercury program would actually cost more than flying an Atlas due to economics of scale. Jupiter's only use other than as a missile system was for the short-lived Juno II launch vehicle, and keeping

8120-549: The Rice University site to first place. Webb informed President Kennedy on September 14 of the decision made by him and deputy administrator Hugh Dryden in two separate memoranda, one reviewing the criteria and procedures, and the other stating: "Our decision is that this laboratory should be located in Houston, Texas, in close association with Rice University and the other educational institutions there and in that region." The Executive Office and NASA made advance notifications of

8265-565: The S-II and S-IVB stages, and made of actual surplus flight-ready articles. It also has real (though incomplete) Apollo command and service modules, intended to fly in the canceled Apollo 19 mission . In June 2019, the restored Apollo Mission Control Center was opened for tourists. In the wake of the January 28, 1986, Space Shuttle Challenger disaster , President Ronald Reagan and First Lady Nancy Reagan traveled to JSC on January 31 to speak at

8410-517: The STG. The team initially came up with a list of 22 cities based on the climate and water criteria, then cut this to a short list of nine with nearby federal facilities: Another 14 sites were then added, including two additional Houston sites chosen because of proximity to Rice University . The team visited all 23 sites between August 21 and September 7, 1961. During these visits, Massachusetts Governor John A. Volpe and Senator Margaret Chase Smith headed

8555-471: The US space program an overtly military flavor, President Eisenhower at first hesitated to give the project top national priority (DX rating under the Defense Production Act ), which meant that Mercury had to wait in line behind military projects for materials; however, this rating was granted in May 1959, a little more than a year and a half after Sputnik was launched. Twelve companies bid to build

8700-415: The World Wide Tracking Network, a chain of 18 stations placed around the equator, which was based on a network used for satellites and made ready in 1960. It collected data from the spacecraft and provided two-way communication between the astronaut and the ground. Each station had a range of 700 nautical miles (1,300 km) and a pass typically lasted 7 minutes. Mercury astronauts on the ground would take

8845-411: The air around the spacecraft. After reentry, a small, drogue parachute ( H ) was deployed at 21,000 ft (6,400 m) for stabilizing the spacecraft's descent. The main parachute ( I ) was deployed at 10,000 ft (3,000 m) starting with a narrow opening that opened fully in a few seconds to lessen the strain on the lines. Just before hitting the water, the landing bag inflated from behind

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8990-433: The angle of retrofire was 34° downward from the flight path angle. Retrorockets fired for 10 seconds each ( F ) in a sequence where one started 5 seconds after the other. During reentry ( G ), the astronaut would experience about 8 g (11–12 g on a suborbital mission). The temperature around the heat shield rose to 3,000 °F (1,600 °C) and at the same time, there was a two-minute radio blackout due to ionization of

9135-422: The astronauts' tasks was publicity; they gave interviews to the press and visited project manufacturing facilities to speak with those who worked on Project Mercury. The press was especially fond of John Glenn, who was considered the best speaker of the seven. They sold their personal stories to Life magazine which portrayed them as 'patriotic, God-fearing family men.' Life was also allowed to be at home with

9280-431: The atmosphere. All seemed possible to overcome: experience from satellites suggested micrometeoroid risk was negligible, and experiments in the early 1950s with simulated weightlessness, high g-forces on humans, and sending animals to the limit of space, all suggested potential problems could be overcome by known technologies. Finally, reentry was studied using the nuclear warheads of ballistic missiles, which demonstrated

9425-407: The award, and the public announcement of the location followed on September 19, 1961. According to Texas A&M University historian Henry C. Dethloff , "Although the Houston site neatly fit the criteria required for the new center, Texas undoubtedly exerted an enormous political influence on such a decision. Lyndon B. Johnson was Vice President and head of the Space Council, Albert Thomas headed

9570-456: The beginning of Project Gemini . On March 13, 1972, after doctors confirmed he no longer had a coronary condition, Slayton returned to flight status and the next year was assigned to the Apollo–Soyuz Test Project , which successfully flew in 1975 with Slayton as the docking module pilot. After the ASTP, he managed the Space Shuttle Program's Approach and Landing Tests (ALT) and Orbital Flight Tests (OFT) before retiring from NASA in 1982. One of

9715-502: The cabin of oxygen. In such case, or failure of the cabin pressure for any reason, the astronaut could make an emergency return to Earth, relying on his suit for survival. The astronauts normally flew with their visor up, which meant that the suit was not inflated. With the visor down and the suit inflated, the astronaut could only reach the side and bottom panels, where vital buttons and handles were placed. The astronaut also wore electrodes on his chest to record his heart rhythm ,

9860-485: The capsule to sink although Grissom was able to be safely recovered. His flight also gave NASA the confidence to move on to orbital flights. Grissom went on to participate in the Gemini and Apollo programs, but died in January 1967 during a pre-launch test for Apollo 1 . John Glenn became the first American to orbit the Earth on Mercury-Atlas 6 February 20, 1962. During the flight, the spacecraft Friendship 7 experienced issues with its automatic control system but Glenn

10005-406: The capsule was just large enough for a single crew member. Inside were 120 controls: 55 electrical switches, 30 fuses and 35 mechanical levers. The heaviest spacecraft, Mercury-Atlas 9, weighed 3,000 pounds (1,400 kg) fully loaded. Its outer skin was made of René 41 , a nickel alloy able to withstand high temperatures. The spacecraft was cone shaped, with a neck at the narrow end. It had

10150-428: The center added 32 Canadian engineers put out of work by the cancellation of the Avro Canada CF-105 Arrow project. NASA's first administrator, T. Keith Glennan , realized that the growth of the U.S. space program would cause the STG to outgrow the Langley and Goddard centers and require its own location. On January 1, 1961, he wrote a memo to his yet-unnamed successor (who turned out to be James E. Webb ), recommending

10295-596: The center the Christopher C. Kraft Jr. Mission Control Center on April 14, 2011. In addition to housing NASA's astronaut operations, JSC is also the site of the former Lunar Receiving Laboratory , where the first astronauts returning from the Moon were quarantined , and where the majority of lunar samples are stored. The center's Landing and Recovery Division operated MV Retriever in the Gulf of Mexico for Gemini and Apollo astronauts to practice water egress after splashdown . On February 19, 1973, four weeks after Johnson's death, President Richard Nixon signed into law

10440-450: The contract to build the electronic equipment for the new Mission Control Center, which would be located in Building 30 of MSC rather than Canaveral or the Goddard Space Flight Center in Maryland. Construction began in 1963. The new center had two Mission Operations Control Rooms, allowing training and preparation for a later mission to be carried out while a live mission is in progress. It

10585-578: The coordinating facility for the Constellation program , which was planned to replace the Shuttle program after 2010, but was canceled in 2009. The visitor center has been the adjacent Space Center Houston since 1994; JSC Building 2 previously housed the visitor center. The Johnson Space Center Heliport ( FAA LID : 72TX ) is located on the campus. About 3,200 civil servants, including 110 astronauts , are employed at Johnson Space Center. The bulk of

10730-743: The corps for at least five years after initial training; military candidates are assigned for specific tours. After these time limits, members of the Astronaut Corps may resign or retire at any time. Three members of the Astronaut Corps ( Gus Grissom , Edward White , and Roger B. Chaffee ) were killed during a ground test accident while preparing for the Apollo 1 mission. Eleven were killed during spaceflight, on Space Shuttle missions STS-51-L and STS-107 . Another four ( Elliot See , Charles Bassett , Theodore Freeman , and Clifton Williams ) were killed in T-38 plane crashes during training for space flight during

10875-409: The corps to civilians, scientists, doctors, engineers, and school teachers. As of the 2009 Astronaut Class, 61% of the astronauts selected by NASA have come from military service. NASA selects candidates from a diverse pool of applicants with a wide variety of backgrounds. From the thousands of applications received, only a few are chosen for the intensive astronaut candidate training program. Including

11020-546: The design submitted as "C" in November 1958. After it failed a test flight in July 1959, a final configuration, "D", emerged. The heat shield shape had been developed earlier in the 1950s through experiments with ballistic missiles, which had shown a blunt profile would create a shock wave that would lead most of the heat around the spacecraft. To further protect against heat, either a heat sink , or an ablative material, could be added to

11165-538: The dynamics of body motion under weightless conditions. Building 31-N houses the Lunar Sample Laboratory Facility , which stores, analyzes, and processes most of the samples returned from the Moon during the Apollo program. The center is also responsible for direction of operations at White Sands Test Facility in New Mexico , which served as a backup Space Shuttle landing site and would have been

11310-471: The escape tower. McDonnell also built the spacecraft simulators used by the astronauts during training, and adopted the motto "First Free Man in Space". A 55-foot-long (17 m) launch vehicle called Little Joe was used for uncrewed tests of the launch escape system, using a Mercury capsule with an escape tower mounted on it. Its main purpose was to test the system at max q , when aerodynamic forces against

11455-608: The families while the astronauts were in space. During the project, Grissom, Carpenter, Cooper, Schirra and Slayton stayed with their families at or near Langley Air Force Base; Glenn lived at the base and visited his family in Washington DC on weekends. Shepard lived with his family at Naval Air Station Oceana in Virginia. Other than Grissom, who was killed in the 1967 Apollo 1 fire, the other six survived past retirement and died between 1993 and 2016. Prior to Project Mercury, there

11600-617: The final review. Following its tour, the team identified MacDill Air Force Base in Tampa as its first choice, based on the fact the Air Force was planning to close down its Strategic Air Command operations there. The Houston Rice University site was second, and the Benicia Ordnance Depot in San Francisco was third. Before a decision could be made, however, the Air Force decided not to close MacDill, omitting it from consideration and moving

11745-451: The first American orbital flight being launched in 1962. The Mercury spacecraft's principal designer was Maxime Faget , who started research for human spaceflight during the time of the NACA. It was 10.8 feet (3.3 m) long and 6.0 feet (1.8 m) wide; with the launch escape system added, the overall length was 25.9 feet (7.9 m). With 100 cubic feet (2.8 m ) of habitable volume,

11890-413: The first crewed Apollo mission, Apollo 7 , becoming the first astronaut to fly three times and the only person to fly in the Mercury, Gemini, and Apollo programs. Gordon Cooper made the last flight of Project Mercury with Mercury-Atlas 9 on May 15, 1963. His flight onboard Faith 7 set another U.S. endurance record with a 34-hour and 19 minute flight duration, and 22 completed orbits. This mission marks

12035-458: The first person in space on an orbital flight. Alan Shepard became the first American in space on a suborbital flight three weeks later, on May 5, 1961. John Glenn, the third Mercury astronaut to fly, became the first American to reach orbit on February 20, 1962, but only after the Soviets had launched a second cosmonaut, Gherman Titov , into a day-long flight in August 1961. Three more Mercury orbital flights were made, ending on May 16, 1963, with

12180-529: The first stage, the sustainer stage continued alone. The sustainer also steered the rocket by thrusters guided by gyroscopes. Smaller vernier rockets were added on its sides for precise control of maneuvers. NASA announced the following seven astronauts – known as the Mercury Seven – on April 9, 1959: Alan Shepard became the first American in space by making a suborbital flight on May 5, 1961. Mercury-Redstone 3 , Shepard's 15 minute and 28 second flight of

12325-405: The flight. On the morning of the trip he typically ate a steak breakfast. After having sensors applied to his body and being dressed in the pressure suit, he started breathing pure oxygen to prepare him for the atmosphere of the spacecraft. He arrived at the launch pad, took the elevator up the launch tower and entered the spacecraft two hours before launch. Once the astronaut was secured inside,

12470-461: The goals of the program were to orbit a crewed spacecraft around Earth, investigate the pilot's ability to function in space, and to recover both pilot and spacecraft safely. Existing technology and off-the-shelf equipment would be used wherever practical, the simplest and most reliable approach to system design would be followed, and an existing launch vehicle would be employed, together with a progressive test program. Spacecraft requirements included:

12615-696: The ground and spacecraft during a flight was awarded to the Western Electric Company . Redstone rockets for suborbital launches were manufactured in Huntsville , Alabama, by the Chrysler Corporation and Atlas rockets by Convair in San Diego, California. For crewed launches, the Atlantic Missile Range at Cape Canaveral Air Force Station in Florida was made available by the USAF. This

12760-505: The ground when passing over a ground station, automatically guided by onboard instruments, or manually by the astronaut, who could replace or override the two other methods. Experience validated the astronauts' insistence on manual controls. Without them, Gordon Cooper 's manual reentry during the last flight would not have been possible. The Mercury spacecraft design was modified three times by NASA between 1958 and 1959. After bidding by potential contractors had been completed, NASA selected

12905-464: The ground, with their results (retrofire times and firing attitude) then transmitted to the spacecraft by radio while in flight. All computer systems used in the Mercury space program were housed in NASA facilities on Earth . (See Ground control for details.) The astronaut lay in a sitting position with his back to the heat shield, which was found to be the position that best enabled a human to withstand

13050-409: The ground. Once in orbit, it was not possible for the spacecraft to change its trajectory except by initiating reentry. Each orbit would typically take 88 minutes to complete. The lowest point of the orbit, called perigee , was at about 87 nautical miles (161 km) altitude, and the highest point, called apogee , was about 150 nautical miles (280 km) altitude. When leaving orbit ( E ),

13195-479: The growing needs of the US human spaceflight program, plans began in 1961 to expand its staff to its own organization, and move it to a new facility. This was constructed in 1962 and 1963 on land donated by the Humble Oil company through Rice University , and officially opened its doors in September 1963. Today, JSC is one of ten major NASA field centers and the city of Houston's primary cultural footprint, earning it

13340-401: The hatch was bolted, the launch area evacuated and the mobile tower rolled back. After this, the launch vehicle was filled with liquid oxygen. The entire procedure of preparing for launch and launching the spacecraft followed a time table called the countdown. It started a day in advance with a pre-count, in which all systems of the launch vehicle and spacecraft were checked. After that followed

13485-480: The heat of atmospheric reentry . Finally, a parachute slowed the craft for a water landing . Both astronaut and capsule were recovered by helicopters deployed from a US Navy ship. The Mercury project gained popularity, and its missions were followed by millions on radio and TV around the world. Its success laid the groundwork for Project Gemini , which carried two astronauts in each capsule and perfected space docking maneuvers essential for crewed lunar landings in

13630-400: The heat shield to reduce the force of impact ( J ). Upon landing the parachutes were released. An antenna ( K ) was raised and sent out signals that could be traced by ships and helicopters . Further, a green marker dye was spread around the spacecraft to make its location more visible from the air. Frogmen brought in by helicopters inflated a collar around the craft to keep it upright in

13775-480: The high g-forces of launch and reentry. A fiberglass seat was custom-molded from each astronaut's space-suited body for maximum support. Near his left hand was a manual abort handle to activate the launch escape system if necessary prior to or during liftoff, in case the automatic trigger failed. To supplement the onboard environmental control system, he wore a pressure suit with its own oxygen supply, which would also cool him. A cabin atmosphere of pure oxygen at

13920-624: The institute and NASA's Human Research Program through 2012. The Prebreathe Reduction Program is a research study program at the JSC that is currently being developed to improve the safety and efficiency of space walks from the International Space Station . The Overset Grid-Flow software was developed at Johnson Space Center in collaboration with NASA Ames Research Center . The software simulates fluid flow around solid bodies using computational fluid dynamics . The Texas Space Commission

14065-584: The international astronauts, Payload Specialists , and Spaceflight Participants go through training with the NASA Astronaut Corps, they are not considered members of the corps. As of October 2024, the corps has 12 "management" astronauts, who remain NASA employees but are no longer eligible for flight assignment. The management astronauts included personnel chosen to join the corps as early as 1987 (Group 12) and as recently as 2009 (Group 20). The term "Astronaut Candidate" (informally "ASCAN") refers to individuals who have been selected by NASA as candidates for

14210-484: The interviews, 32 were selected for further physical and mental testing. Their health, vision, and hearing were examined, together with their tolerance to noise, vibrations, g-forces, personal isolation, and heat. In a special chamber, they were tested to see if they could perform their tasks under confusing conditions. The candidates had to answer more than 500 questions about themselves and describe what they saw in different images. Navy Lt (later Capt) Jim Lovell , who

14355-481: The last time an American was launched alone to conduct an entirely solo orbital mission. Cooper later went on to participate in Project Gemini where he once again beat the endurance record during Gemini 5 . Deke Slayton was grounded in 1962 due to a heart condition, but remained with NASA and was appointed senior manager of the Astronaut Office and later additionally assistant director of Flight Crew Operations at

14500-412: The mission order, with some capsules being reserved as backup or used in tests. Times given are Coordinated Universal Time , local time + 5 hours. MA = Mercury-Atlas, MR = Mercury-Redstone, LC = Launch Complex. The 20 uncrewed flights used Little Joe, Redstone, and Atlas launch vehicles. They were used to develop the launch vehicles, launch escape system, spacecraft and tracking network. One flight of

14645-449: The narrow end of the spacecraft contained three parachutes: a drogue to stabilize free fall and two main chutes, a primary and reserve. Between the heat shield and inner wall of the crew compartment was a landing skirt, deployed by letting down the heat shield before landing. On top of the recovery compartment was the antenna section ( 5 ) containing both antennas for communication and scanners for guiding spacecraft orientation. Attached

14790-525: The nation was led by Vice-President Dick Cheney and his wife Lynne at Washington National Cathedral two days later. On September 13, 2008, Hurricane Ike hit Galveston as a category 2 hurricane and caused minor damage to the Mission Control Center and other buildings at JSC. The storm damaged the roofs of several hangars for the T-38 Talons at Ellington Field . The Johnson Space Center

14935-466: The new crewed spaceflight laboratory. A set of requirements for the new site was drawn up and released to the Congress and general public. These included: access to water transport by large barges, a moderate climate, availability of all-weather commercial jet service, a well-established industrial complex with supporting technical facilities and labor, close proximity to a culturally attractive community in

15080-463: The new position of astronaut. During this time, women were banned from flying in the military and so could not successfully qualify as test pilots. This meant that no female candidates could earn consideration for the title of astronaut. Civilian NASA X-15 pilot Neil Armstrong was also disqualified, though he had been selected by the US Air Force in 1958 for its Man in Space Soonest program, which

15225-422: The next goal. The Soviet Union put the first human, cosmonaut Yuri Gagarin , into a single orbit aboard Vostok 1 on April 12, 1961. Shortly after this, on May 5, the US launched its first astronaut, Alan Shepard , on a suborbital flight. Soviet Gherman Titov followed with a day-long orbital flight in August 1961. The US reached its orbital goal on February 20, 1962, when John Glenn made three orbits around

15370-414: The number of candidates at 508. These candidates were USN or USMC naval aviation pilots (NAPs), or USAF pilots of Senior or Command rating . These aviators had long military records, which would give NASA officials more background information on which to base their decisions. Furthermore, these aviators were skilled in flying the most advanced aircraft to date, giving them the best qualifications for

15515-477: The number of scientists and engineers in this area, to increase its outlays for salaries and expenses to $ 60 million a year; to invest some $ 200 million in plant and laboratory facilities; and to direct or contract for new space efforts over $ 1 billion from this Center in this City. The 1,620-acre (6.6 km ) facility was officially opened for business in September 1963. In 1961, as plans for Project Gemini began, it became increasingly clear that

15660-440: The numbering of crewed missions did not start with 1. Also, there were two separately numbered series: MR for "Mercury-Redstone" (suborbital flights), and MA for "Mercury-Atlas" (orbital flights). These names were not popularly used, since the astronauts followed a pilot tradition, each giving their spacecraft a name. They selected names ending with a "7" to commemorate the seven astronauts. Spacecraft production numbers don't match

15805-520: The official nickname "Space City" in 1967. Johnson Space Center has its origins in NASA 's Space Task Group (STG). Starting on November 5, 1958, Langley Research Center engineers under Robert R. Gilruth directed Project Mercury and follow-on crewed space programs. The STG originally reported to the Goddard Space Flight Center organization, with a total staff of 45, including 37 engineers, and eight secretaries and human "computers" (women who ran calculations on mechanical adding machines). In 1959,

15950-473: The package could be severed when it was no longer needed. Next to the heat shield was the pressurized crew compartment ( 3 ). Inside, an astronaut would be strapped to a form-fitting seat with instruments in front of him and with his back to the heat shield. Underneath the seat was the environmental control system supplying oxygen and heat, scrubbing the air of CO 2 , vapor and odors, and (on orbital flights) collecting urine. The recovery compartment ( 4 ) at

16095-668: The planning and training of the U.S. astronaut corps and houses training facilities such as the Sonny Carter Training Facility and the Neutral Buoyancy Laboratory , a critical component in training astronauts for spacewalks. The Neutral Buoyancy Laboratory provides a controlled neutral buoyancy environment—a very large pool containing about 6.2 million U.S. gallons (23,000 m ) of water where astronauts train to practice extra-vehicular activity tasks while simulating zero-g conditions. The facility provides preflight training in becoming familiar with crew activities and with

16240-511: The position of the spacecraft, its ground track and the place it could land in an emergency within the next 30 minutes. Other computers associated with ground control for Mercury included a vacuum-tube-based IBM 709 system in Cape Canaveral which determined whether a mid-launch abort might be needed and where an aborting capsule would land, another IBM 709 in Bermuda which served as backup for

16385-404: The property would face a highway, and the total included another 20 acres (8.1 ha) reserve drilling site. Construction of the center, designed by Charles Luckman , began in April 1962, and Gilruth's new organization was formed and moved to the temporary locations by September. That month, Kennedy gave a speech at Rice University on the U.S. space program. The speech is famous for highlighting

16530-524: The role of Capsule Communicator, or CAPCOM, who communicated with the astronaut in orbit. Data from the spacecraft were sent to the ground, processed at the Goddard Space Center by a redundant pair of transistorized IBM 7090 computers and relayed to the Mercury Control Center at Cape Canaveral. In the Control Center, the data were displayed on boards on each side of a world map, which showed

16675-492: The second Mercury flight as a crude workaround. It would take until the third flight in February 1962 before a dedicated urine collection device was installed. Once in orbit, the spacecraft could be rotated in yaw, pitch, and roll : along its longitudinal axis (roll), left to right from the astronaut's point of view (yaw), and up or down (pitch). Movement was created by rocket-propelled thrusters which used hydrogen peroxide as

16820-413: The selection committee accept him. USAF Capt. (later Col.) Joseph Kittinger , a USAF fighter pilot and stratosphere balloonist, met all the requirements but preferred to stay in his contemporary project. Other potential candidates declined because they did not believe that human spaceflight had a future beyond Project Mercury. From the original 508, 110 candidates were selected for an interview, and from

16965-413: The shield. The heat sink would remove heat by the flow of the air inside the shock wave, whereas the ablative heat shield would remove heat by a controlled evaporation of the ablative material. After uncrewed tests, the latter was chosen for crewed flights. Apart from the capsule design, a rocket plane similar to the existing X-15 was considered. This approach was still too far from being able to make

17110-429: The spacecraft peaked, making separation of the launch vehicle and spacecraft most difficult. It was also the point at which the astronaut was subjected to the heaviest vibrations. The Little Joe rocket used solid-fuel propellant and was originally designed in 1958 by NACA for suborbital crewed flights, but was redesigned for Project Mercury to simulate an Atlas-D launch. It was produced by North American Aviation . It

17255-428: The spacecraft, the pilot would experience weightlessness as shown on the image. The recovery procedure would be the same as an orbital mission.[AS] Preparations for a mission started a month in advance with the selection of the primary and back-up astronaut; they would practice together for the mission. For three days prior to launch, the astronaut went through a special diet to minimize his need for defecating during

17400-425: The subsequent Apollo program announced a few weeks after the first crewed Mercury flight. Project Mercury was officially approved on October 7, 1958, and publicly announced on December 17. Originally called Project Astronaut, President Dwight Eisenhower felt that gave too much attention to the pilot. Instead, the name Mercury was chosen from classical mythology , which had already lent names to rockets like

17545-626: The time, the land was used to graze cattle. Immediately after Webb's announcement, Gilruth and his staff began planning the move from Langley to Houston, using what would grow to 295,996 sq ft (27,498.9 m ) of leased office and laboratory space in 11 scattered sites. On November 1, the conversion of the Task Group to MSC became official. Tracts of land in the vicinity of the Manned Spacecraft Center were either owned or being under exclusive control of Joseph L. Smith & Associates, Inc. NASA purchased an additional 600 acres (240 ha) so

17690-538: The top of the curve, the spacecraft's retrorockets were fired for testing purposes; they were not necessary for reentry because orbital speed had not been attained. The spacecraft landed in the Atlantic Ocean. The suborbital mission took about 15 minutes, had an apogee altitude of 102–103 nautical miles (189–191 km), and a downrange distance of 262 nautical miles (485 km). From the time of booster-spacecraft separation until reentry where air started to slow down

17835-425: The two IBM 7090 transistor-based machines at Goddard, and a Burroughs-GE system which provided radio guidance for the Atlas during launch. The World Wide Tracking Network went on to serve subsequent space programs, until it was replaced by a satellite relay system in the 1980s. Mission Control Center was moved from Cape Canaveral to Houston in 1965. On April 12, 1961, the Soviet cosmonaut Yuri Gagarin became

17980-471: The vicinity of an institution of higher education, a strong electric utility and water supply, at least 1,000 acres (400 ha) of land, and certain specified cost parameters. In August 1961, Webb asked Associate Director of the Ames Research Center John F. Parsons to head a site-selection team, which included Philip Miller, Wesley Hjornevik, and I. Edward Campagna, the construction engineer for

18125-416: The water. The recovery helicopter hooked onto the spacecraft and the astronaut blew the escape hatch to exit the capsule. He was then hoisted aboard the helicopter that finally brought both him and the spacecraft to the ship. The number of personnel supporting a Mercury mission was typically around 18,000, with about 15,000 people associated with recovery. Most of the others followed the spacecraft from

18270-698: The workforce consists of over 11,000 contractors. As of October 2014, Stinger Ghaffarian Technologies took over United Space Alliance 's primary contract. As of June 2021, the center's director is Vanessa E. Wyche . NASA's astronaut training is conducted at the Johnson Space Center. Astronaut candidates receive training on spacecraft systems and in basic sciences including mathematics, guidance and navigation, oceanography, orbital dynamics, astronomy, and physics. Candidates are required to complete military water survival prior to beginning their flying instruction. Candidates are also required to become scuba -qualified for extravehicular training and are required to pass

18415-557: Was a flap used to ensure the spacecraft was faced heat shield first during reentry. A launch escape system ( 6 ) was mounted to the narrow end of the spacecraft containing three small solid-fueled rockets which could be fired briefly in a launch failure to separate the capsule safely from its booster. It would deploy the capsule's parachute for a landing nearby at sea. (See also Mission profile for details.) The Mercury spacecraft did not have an on-board computer, instead relying on all computation for reentry to be calculated by computers on

18560-495: Was able to manually control the spacecraft's attitude. He quit NASA in 1964, when he came to the conclusion that he likely would not be selected for any Apollo missions, and was later elected to the US Senate, serving from 1974 to 1999. During his tenure, he returned to space in 1998 as a Payload Specialist aboard STS-95 . Scott Carpenter was the second astronaut in orbit and flew on Mercury-Atlas 7 on May 24, 1962. The spaceflight

18705-675: Was also the site of the Mercury Control Center while the computing center of the communication network was in Goddard Space Center , Maryland. Little Joe rockets were launched from Wallops Island , Virginia. Astronaut training took place at Langley Research Center in Virginia, Lewis Flight Propulsion Laboratory in Cleveland, Ohio, and Naval Air Development Center Johnsville in Warminster, PA. Langley wind tunnels together with

18850-522: Was brought online for testing purposes during the uncrewed Gemini 2 flight in January 1965 and the first crewed Gemini flight, Gemini 3 in March 1965, though the Mercury Control Center still retained primary responsibility for control of these flights. It became fully operational for the flight of Gemini 4 the following June, and has been the primary flight control center for all subsequent U.S. crewed space missions from Project Gemini forward. NASA named

18995-411: Was built up at lift-off ( A ). After 30 seconds of flight, the point of maximum dynamic pressure against the vehicle was reached, at which the astronaut felt heavy vibrations. After 2 minutes and 10 seconds, the two outboard booster engines shut down and were released with the aft skirt, leaving the center sustainer engine running ( B ). At this point, the launch escape system was no longer needed, and

19140-536: Was essentially a repeat of Mercury-Atlas 6, but a targeting error during re-entry took Aurora 7 250 miles (400 km) off-course, delaying recovery. Afterwards, he joined the Navy's "Man in the Sea" program and is the only American to be both an astronaut and an aquanaut . Carpenter's Mercury flight was his only trip into space. Wally Schirra flew aboard Sigma 7 on Mercury-Atlas 8 on October 3, 1962. The mission's main goal

19285-410: Was established by Texas governor Greg Abbott on March 26, 2024 at Johnson Space Center. Astronauts, center directors, and other NASA employees are memorialized in a Memorial Grove near the main entrance and visitor badging center (building 110). Trees dedicated to the memory of astronauts and center directors are in a round cluster closest to the entrance, other employees are memorialized behind along

19430-477: Was held at the Johnson Space Center on February 4, 2003, for the astronauts who perished in the Space Shuttle Columbia disaster three days before, which was attended by President George W. Bush and First Lady Laura Bush . Although that service was broadcast live by the national television and radio networks, it was geared mainly to NASA employees and the families of the astronauts. A second service for

19575-430: Was in 2000 when there were 149. All of the current astronaut corps are from the classes of 1996 (Group 16) or later. Missions in italics are scheduled and subject to change. There are currently 19 "international active astronauts", "who are assigned to duties at the Johnson Space Center", who were selected by their home agency to train as part of a NASA Astronaut Group and serve alongside their NASA counterparts. While

19720-465: Was included for the Mercury astronauts. An inquiry on the subject was made in February 1961 by a student, but NASA responded by stating that "the first space man is not expected to have 'to go". The expected short flight times meant that this was overlooked, although after Alan Shepard had a launch delay of four hours, he was forced to urinate in his suit, short-circuiting some of the electrodes monitoring his vital signs. Gus Grissom wore two rubber pants on

19865-401: Was later an astronaut in the Gemini and Apollo programs , did not pass the physical tests. After these tests it was intended to narrow the group down to six astronauts, but in the end it was decided to keep seven. The astronauts went through a training program covering some of the same exercises that were used in their selection. They simulated the g-force profiles of launch and reentry in

20010-512: Was no protocol for selecting astronauts, so NASA would set a far-reaching precedent with both their selection process and initial choices for astronauts. At the end of 1958, various ideas for the selection pool were discussed privately within the national government and the civilian space program, and also among the public at large. Initially, there was the idea to issue a widespread public call to volunteers. Thrill-seekers such as rock climbers and acrobats would have been allowed to apply, but this idea

20155-528: Was not able to change direction; instead its flight depended on the angle from which it was launched. Its maximum altitude was 100 mi (160 km) fully loaded. A Scout launch vehicle was used for a single flight intended to evaluate the tracking network; however, it failed and was destroyed from the ground shortly after launch. The Mercury-Redstone Launch Vehicle was an 83-foot-tall (25 m) (with capsule and escape system) single-stage launch vehicle used for suborbital ( ballistic ) flights. It had

20300-547: Was produced by North American Aviation and its direction could be altered during flight by its fins. They worked in two ways: by directing the air around them, or by directing the thrust by their inner parts (or both at the same time). Both the Atlas-D and Redstone launch vehicles contained an automatic abort sensing system which allowed them to abort a launch by firing the launch escape system if something went wrong. The Jupiter rocket, also developed by Wernher von Braun 's team at

20445-415: Was quickly shot down by NASA officials who understood that an undertaking such as space flight required individuals with professional training and education in flight engineering. By late 1958, NASA officials decided to move forward with test pilots being the heart of their selection pool. On President Eisenhower's insistence, the group was further narrowed down to active duty military test pilots , which set

20590-421: Was recovered from the bottom of the Atlantic Ocean after 38 years. Some spacecraft were modified after initial production (refurbished after launch abort, modified for longer missions, etc.). A number of Mercury boilerplate spacecraft (made from non-flight materials or lacking production spacecraft systems) were also made by NASA and McDonnell. They were designed and used to test spacecraft recovery systems and

20735-481: Was replaced by Mercury. Although Armstrong had been a combat-experienced NAP during the Korean War, he left active duty in 1952. Armstrong became NASA's first civilian astronaut in 1962 when he was selected for NASA's second group, and became the first man on the Moon in 1969. It was further stipulated that candidates should be between 25 and 40 years old, no taller than 5 ft 11 in (1.80 m), and hold

20880-400: Was separated from the spacecraft by its jettison rocket ( C ). The space vehicle moved gradually to a horizontal attitude until, at an altitude of 87 nautical miles (161 km), the sustainer engine shut down and the spacecraft was inserted into orbit ( D ). This happened after 5 minutes and 10 seconds in a direction pointing east, whereby the spacecraft would gain speed from the rotation of

21025-456: Was to show development of environmental controls or life-support systems that would allow for safety in space, thus being a flight mainly focused on technical evaluation, rather than scientific experimentation. The mission lasted 9 hours and 13 minutes, setting a new U.S. flight duration record. In December 1965, Schirra flew on Gemini 6A , achieving the first ever space rendezvous with sister spacecraft Gemini 7 . Three years later, he commanded

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