The Broad Band X-ray Telescope ( BBXRT ) was flown on the Space Shuttle Columbia ( STS-35 ) from December 2 through December 11, 1990 as part of the ASTRO-1 payload. The flight of BBXRT marked the first opportunity for performing X-ray observations over a broad energy range (0.3-12 k eV ) with a moderate energy resolution (typically 90 eV and 150 eV at 1 and 6 keV, respectively).
6-432: BBXRT was co-mounted with three ultraviolet telescopes HUT , WUPPE, and HIT for Astro-1 in 1990. This was, "..the first focusing X-ray telescope operating over a broad energy range 0.3-12 keV with a moderate energy resolution (90 eV at 1 keV and 150eV at 6 keV)." according to NASA. This telescope -related article is a stub . You can help Misplaced Pages by expanding it . This article about one or more spacecraft of
12-410: The evolution of galaxies . They can be used to discern the presence of a hot white dwarf or main sequence companion in orbit around a cooler star. The ultraviolet universe looks quite different from the familiar stars and galaxies seen in visible light . Most stars are actually relatively cool objects emitting much of their electromagnetic radiation in the visible or near- infrared part of
18-521: The human eye . Most of the light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space. Ultraviolet line spectrum measurements ( spectroscopy ) are used to discern the chemical composition, densities, and temperatures of the interstellar medium , and the temperature and composition of hot young stars. UV observations can also provide essential information about
24-462: The United States is a stub . You can help Misplaced Pages by expanding it . Ultraviolet telescope Ultraviolet astronomy is the observation of electromagnetic radiation at ultraviolet wavelengths between approximately 10 and 320 nanometres ; shorter wavelengths—higher energy photons—are studied by X-ray astronomy and gamma-ray astronomy . Ultraviolet light is not visible to
30-416: The spectrum. Ultraviolet radiation is the signature of hotter objects, typically in the early and late stages of their evolution . In the Earth's sky seen in ultraviolet light, most stars would fade in prominence. Some very young massive stars and some very old stars and galaxies, growing hotter and producing higher-energy radiation near their birth or death, would be visible. Clouds of gas and dust would block
36-578: The vision in many directions along the Milky Way . Space-based solar observatories such as SDO and SOHO use ultraviolet telescopes (called AIA and EIT , respectively) to view activity on the Sun and its corona . Weather satellites such as the GOES-R series also carry telescopes for observing the Sun in ultraviolet. The Hubble Space Telescope and FUSE have been the most recent major space telescopes to view
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