Video encyclopedia



Driving on the Surface of Mars


Do You Remember the First Time We Saw Mars?


★ How to Get to Mars. Very Cool! HD


Magnificent Seven on Mars: Opportunity


Opportunity Rover Completes a Marathon on Mars with our Team’s Help

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury. In English, Mars carries a name of the Roman god of war, and is often referred to as the "Red Planet" because the reddish iron oxide prevalent on its surface gives it a reddish appearance that is distinctive among the astronomical bodies visible to the naked eye. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the valleys, deserts, and polar ice caps of Earth.
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  • Fun facts 

  • Names 

  • Physical characteristics 

  • Orbit and rotation 

  • Habitability and search for life 

  • Moons 

  • Exploration 

  • Astronomy on Mars 

  • Viewing 

  • Historical observations 

  • In culture