Mars is only a small planet.It is about half as big as the Earth. However scientists are.vist mars wrs was mariner 4 in 1965.since then,more than thirty spaceraft have been aent to learn more about the planet and its two
Small moons The most successtul of these until now has been the USA's Phenix which landed on Mars on 25 May 2008 Phoenix took more than 30,000picturer of the planet Scietists have learned a lot about Mars these pictures