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Far Ultraviolet Spectroscopic Explorer
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Far Ultraviolet Spectroscopic Explorer

United States satellite observatory
Also known as: FUSE
Written by
Dave Dooling
Education and Public Outreach Officer, National Solar Observatory, Sacramento Peak, New Mexico. Coauthor of Engineering Tomorrow.
Dave Dooling
Fact-checked by
Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

Far Ultraviolet Spectroscopic Explorer (FUSE), U.S. satellite observatory that observed the universe in far-ultraviolet light (wavelengths between 90.5 and 119.5 nanometres). FUSE was launched on June 24, 1999. One of its main aims was the study of hydrogen-deuterium (H-D) ratios in intergalactic clouds and interstellar clouds unaffected by star formation in an effort to determine the H-D ratio as it was shortly after the big bang; such a measurement allows the determination of the amount...

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