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Mars 2001 Odyssey
Mars 2001 Odyssey Mission to Mars
Mars 2001 Odyssey:
Mars Odyssey used a process called aerobraking, the spacecraft skimmed the surface of the Mars' atmosphere 332 times over nearly three months to slow down. The procedure saved more than 200 kilograms (440 pounds) of fuel, which allowed NASA to launch it on a smaller - and less expensive - Delta II 7925 launch vehicle. Aerobraking was also used on the Mars Global Surveyor mission.

After a little orbital fine tuning, Odyssey began a 917 day mission to map the Martian surface and search for signs of water ice on the surface.
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