Following in the same year were the first uncontrolled impact (mars 2) and first successful landing (mars 3) on mars Probes have been active on mars continuously since 1997. This dynamic planet has seasons, polar ice caps, extinct volcanoes, canyons and weather. Mars is the fourth planet in the solar system in order of distance from the sun and the seventh in size and mass It is a periodically conspicuous reddish object in the night sky Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the moon and the volcanoes, valleys, deserts, and polar ice caps of earth
The rotational period and seasonal cycles of mars are likewise similar to those of earth, as is the tilt that produces the seasons. A guide to the red planet, mars, including facts about its geology, a history of mars missions and images captured by astrophotographers. Mars once had liquid water on its surface and could have supported life Scientists are uncovering how mars transformed into the cold, dry desert world it is today. Mars is one of the most explored bodies in our solar system, and it's the only planet where we've sent rovers to explore the alien landscape Nasa missions have found lots of evidence that mars was much wetter and warmer, with a thicker atmosphere, billions of years ago.
