Mars Mariner 9 Spacecraft
Mariner 9 became the first
spacecraft to orbit another planet. Launched on May 30, 1971, spacecraft
circled Mars twice each day for a full year, photographing the surface
and analyzing the atmosphere with infrared and ultraviolet instruments.
The spacecraft gathered data on the atmospheric composition, density,
pressure, and temperature and also the surface composition, temperature,
and topography of Mars.
Picture of Mars Moon Phobos taken by Mariner 9 Camera