On March 4, 1979, NASA's Voyager 1 spacecraft took the first photos of rings around Jupiter.

Antarctica has lost nearly 5,000 square miles of "grounded ice" in 30 years, as warming ocean waters drive retreat in vulnerable regions, a new study finds.

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Russia has fixed Site 31 at Baikonur Cosmodrome, the only pad supporting the nation's human spaceflight missions. It had been out of commission since late November.