2001 Mars Odyssey
Mission patch
2001 Mars Odyssey, launched April 7, 2001, is a spacecraft orbiting Mars. It reached Mars orbit on October 24, 2001.
In May 2002, NASA reported that Odyssey had detected large amounts of hydrogen, which could mean ice just under the planet's surface.
By October 2008, Odyssey had mapped the distribution of water below the surface of Mars.
In December 2010, it broke the record for the longest serving spacecraft at Mars and currently holds the record for the longest-surviving continually active spacecraft in orbit around a planet other than Earth. Its mission has been extended until 2025.
In 2013 the Siding Spring Comet passed very closely to Mars, but Odyssey, the Mars Reconnaissance Orbiter and MAVEN were unaffected.
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