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STS-35 was a mission of the U.S. space shuttle Columbia that took place from December 2 to December 10, 1990. The primary objective of this mission was to carry the Astro-1 instrument, which consisted of four separate telescopes designed to observe the ultraviolet portion of the electromagnetic spectrum. These telescopes were used to study celestial objects from orbit, above Earth's atmosphere, which allows for clearer and more detailed observations than ground-based telescopes. The crew of STS-35 included Vance Brand, Guy Gardner, Jeffrey Hoffman, John Lounge, Robert Parker, Ronald Parise, and Samuel Durrance.123

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