On November 14, 1971, U.S. spacecraft Mariner 9 was the first spacecraft to orbit another planet – only narrowly beating the Soviets’s Mars 2 and Mars 3, which both arrived within a month. After months of dust storms it managed to send back clear pictures of Mars’ surface. The Exploration of Mars Many unmanned space probes have been sent to Mars, some of which were successful. About half of the missions ended…Read more
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