Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

External Websites

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...