Number
of Satellites: 2
(Phobos and Deimos)
Rotation Period: 24
hours and 37 minutes
Temperature:
-140 to 20 degrees celsius (-220 to 60 fahrenheit)
Length
of Year: About 1
Earth-year and ten and a half months
Diameter:
6796 Kms (4223 Miles)
Atmosphere: Mainly
Carbon Dioxide
Nasa's Mars Robotic Exploration:
Mars was explored in flybys by Mariner 4, 6 and 7 in the 1960s and by the orbiting Mariner 9 in 1971 before NASA mounted the ambitious Viking mission, which launched two orbiters and two landers to the planet in 1975. The landers found no chemical evidence of life.
Mars Pathfinder landed on the planet on July 4, 1997, delivering a mobile robot rover that explored the immediate vicinity. Mars Global Surveyor is creating the highest-resolution map of the planets surface.
Russia/Soviets Mars Robotic Exploration:
Started in the 1960's with the Mars Program. The last endeavour
by Russia was Mars 96.
