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| EUVE | |
|---|---|
| Name | EUVE |
| Mission type | Astrophysics |
| Operator | NASA / Ball Aerospace / University of California, Berkeley |
| Mission duration | Launched 1992; operations 1992–2001 |
| Manufacturer | Ball Aerospace |
| Launch mass | 825 kg |
| Launch date | 1992-02-07 |
| Launch rocket | Delta II |
| Launch site | Cape Canaveral Air Force Station |
| Orbit | High-inclination geocentric |
EUVE The Extreme Ultraviolet Explorer was a NASA-funded space observatory designed to survey the sky in the extreme ultraviolet band. It performed an all-sky survey and pointed observations that filled a critical spectral gap between International Ultraviolet Explorer and X-ray observatories such as ROSAT and Chandra X-ray Observatory. The mission involved partnerships among NASA, Ball Aerospace, and the University of California, Berkeley and provided data to researchers at institutions including Harvard–Smithsonian Center for Astrophysics, Smithsonian Astrophysical Observatory, and Space Telescope Science Institute.
The spacecraft conducted observations in the extreme ultraviolet (EUV) wavelength range, mapping sources such as hot stars, white dwarfs, cataclysmic variables, active galactic nuclei, and the interstellar medium. Key mission goals were sky survey, deep pointings, and spectroscopic follow-up to characterize emission and absorption features missed by predecessors like International Ultraviolet Explorer and contemporaries like ROSAT and EUVE-related projects at Los Alamos National Laboratory. The payload complemented investigations by observatories such as Hubble Space Telescope, Compton Gamma Ray Observatory, and Far Ultraviolet Spectroscopic Explorer.
Conceptual studies began in the 1970s and 1980s as EUV technology advanced at places including Lockheed Martin, Ball Aerospace, NASA Ames Research Center, and Goddard Space Flight Center. The mission was selected by NASA in the late 1980s as part of small explorer-class initiatives alongside missions supported by Jet Propulsion Laboratory and university consortia at University of Colorado Boulder and Massachusetts Institute of Technology. Key figures included investigators from University of California, Berkeley, engineers from Ball Aerospace, and program managers at NASA Headquarters. Development encountered challenges similar to those experienced by ROSAT and Einstein Observatory, but benefited from laboratory work at Lawrence Livermore National Laboratory and Sandia National Laboratories on multilayer coatings and detector technology.
The observatory carried grazing-incidence telescopes and spectrometers using normal-incidence multilayer coatings developed from research at Columbia University, Stanford University, and MIT Lincoln Laboratory. Detectors included microchannel plate photomultipliers and imaging proportional counters adapted with heritage from HEAO-1 and detector teams at Argonne National Laboratory. The spacecraft bus was built by Ball Aerospace using avionics similar to those on missions from TRW Inc. and propulsion modules with components from Aerojet Rocketdyne. Thermal control and pointing employed reaction wheels and star trackers of the kind used on Hubble Space Telescope and COBE, while ground communications used the Deep Space Network and White Sands Complex facilities.
Mission operations were conducted from operations centers at Ball Aerospace and the University of California, Berkeley with science support from teams at Harvard–Smithsonian Center for Astrophysics and the Space Telescope Science Institute. Data archives were distributed through repositories modeled on NASA Goddard Space Flight Center archives and later incorporated into services run by NASA/IPAC and the High Energy Astrophysics Science Archive Research Center. Products included calibrated spectra, all-sky maps, source catalogs, light curves, and instrument response matrices used by analysts at Princeton University, University of Chicago, Caltech, University of Michigan, and University of Texas at Austin. Software for reduction and analysis borrowed algorithms developed at NASA Ames Research Center, Los Alamos National Laboratory, and SAO.
The mission discovered numerous EUV sources, refined models of the local interstellar medium, and characterized the atmospheres of hot white dwarfs and O-type stars. Findings influenced theoretical work from groups at Max Planck Institute for Astronomy, Institute for Advanced Study, and Kavli Institute for Theoretical Physics. EUV surveys revealed variability in cataclysmic variables studied at University of Cambridge and University of Oxford, while observations of active galactic nuclei complemented studies by European Southern Observatory and Keck Observatory. Cross-correlation with catalogs from Two Micron All Sky Survey, Sloan Digital Sky Survey, GALEX, and IRAS enriched multiwavelength astronomy programs at NOAO and Space Science Institute. The mission also informed instrument design for later ultraviolet and X-ray missions supported by ESA, DLR, CNES, and national agencies in Japan Aerospace Exploration Agency.
Technologies and scientific lessons influenced successor missions and proposals such as Far Ultraviolet Spectroscopic Explorer, XMM-Newton, Chandra X-ray Observatory, and concept studies at NASA Goddard and JPL for future EUV and soft X-ray facilities. Academic programs at University of California, Santa Cruz, Dartmouth College, University of Leiden, and University of Sydney continued to use archived datasets for studies in stellar evolution, white dwarf atmospheres, and the interstellar medium. Instrument heritage appears in technology developed for missions proposed to NASA Small Explorer Program and for instruments built by companies like Ball Aerospace and Lockheed Martin for observatories under ESA and JAXA partnerships. The mission remains represented in archival collections at NASA centers and university libraries and is cited in ongoing research at institutions including Columbia University, Yale University, Brown University, and Rutgers University.
Category:NASA spacecraft Category:Ultraviolet telescopes Category:Space telescopes launched in 1992