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Missions to Venus: Highlights From History, and When We May Go Back

作者:admin 2020-09-16

An artist’s rendering of NASA’s Pioneer Venus 2 spacecraft and four atmospheric probes, for a 1978 mission to learn more about the planet’s atmosphere.Credit...Paul Hudson/NASABy Shannon StironeSept. 14, 2020Carl Sagan once said that Venus is the pla 阅读全文

A Rip in the Fabric of Interstellar Dreams

作者:admin 2020-08-22

ImageThe gash viewed from below. The dome that hangs over the reflector dish and the platform to access the dome were also damaged.Credit...Arecibo Observatory, via Associated PressOn the morning of Aug. 10, a cable that helped support the triangular 阅读全文