Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots. Mars is the fourth planet from the Sun. It is also known as the " Red Planet ", for its orange-red appearance. [22][23] Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxide (CO2). Mars is the fourth planet from the Sun , orbiting at an average of 228 million kilometres away from the star. The planet moves at a speed of around 24 kilometres per second, making it slightly slower than Earth. It has an elliptical orbit, meaning it is egg- or oval-shaped. Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, nicknamed The Red Planet . Mars is a terrestrial planet with caps of water and carbon dioxide. [5][6] It has the largest volcano in the Solar System, and some very large impact craters.
