control of the government of a state, community, or other body by its own members; democratic government. the condition of being self-governed.
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, after Mercury. Named after the Roman god of war, it is often referred to as the Red Planet because the iron oxide prevalent on its surface gives it a reddish appearance.
These include: 1  The Martian day (or sol) is very close in duration to Earth's. 2  Mars has a surface area that is 28.4% of Earth's, only slightly less than the amount of dry land on Earth (which is 29.2% of Earth's surface). 3  Mars has an axial tilt of 25.19Â°, similar to Earth's 23.44Â°.