May 30, 1971
Launched on May 30, 1971 and reached Mars on November 14, 1971. It was the first spacecraft from earth to go into orbit around another planet. Mariner 9 took over 7000 pictures of the planet and studied what the atmosphere and surface was composed of as well as Mars gravity and typography. It also took close up pictures of Mars’ moons Phobos and Deimos.