EUVE All Sky Survey
Credit: EUVE/CEA/Berkeley

The Extreme Ultraviolet Universe

The region of the electromagnetic spectrum known as the "Extreme Ultraviolet" can provide an enormous amount of information about physical processes in the cosmos, since many important processes generate extreme ultraviolet radiation, and because the amount of extreme ultraviolet radiation produced by an object can alter the amount of radiation generated in other regions of the EM spectrum. Unfortunately, nature is unkind, since neutral hydrogen (the most abundant material in the universe) is extremely efficient at absorbing extreme UV radiation. Thus, detection of extreme UV radiation requires especially sensitive instrumentation, and relatively little hydrogen between us and the source. We can't do anything about the latter, but the former requirement was met by the Extreme Ultraviolet Explorer (EUVE), a NASA mission designed and built at the Space Sciences Laboratory at the University of California, Berkeley, under the direction of Dr. Roger F. Malina. EUVE was launched on June 7, 1992. The image above represents the extreme ultraviolet emission from the entire universe as seen by EUVE. In addition to stellar objects, the Cygnus loop and Vela supernova remnants are visible. The image was created by combining EUVE scans of many small strips of the sky. These scans were taken during the all-sky-survey portion of the EUVE mission. The black strips are data gaps.

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Page Author: Dr. Michael F. Corcoran
Last modified June 14, 2001