Extreme Ultraviolet Explorer
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Extreme Ultraviolet Explorer:see ultraviolet astronomyultraviolet astronomy,
study of celestial objects by means of the ultraviolet radiation they emit, in the wavelength range from about 90 to about 350 nanometers. Ultraviolet (UV) line spectrum measurements are used to discern the chemical composition, densities, and temperatures
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Extreme Ultraviolet Explorer(EUVE) A NASA satellite launched June 1992 to carry out the first survey of the sky in the extreme ultraviolet (7–76 nm) region of the spectrum. Radiation at these wavelengths is totally screened out by the Earth's atmosphere, and so this mission was expected to be of groundbreaking significance. The 3.2-tonne satellite carried four photometric imaging systems and a three-channel EUV spectrometer. The imaging instruments were used to accomplish the sky survey. The spectrometers were used for the pointed spectroscopic programs, which collected data from over 350 unique astronomical targets. NASA authorized a Guest Observer Program of pointed spectroscopy that ended on Jan. 31, 2001, when the EUVE was shut down. The satellite fell out of orbit and broke up in the Earth's atmosphere at the end of Jan. 2002.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006