Mars
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'.
The latter refers to the effect of the iron oxide prevalent on Mars' surface, which gives it a reddish appearance 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.
Mars Facts
- Diameter: 1.6318×1011 km3(0.151 Earths)
- Mass: 6.4171×1023 kg(0.107 Earths)
- Moons: 2, Phobos and Deimos
- Orbit Distance: 230 million kilometers
- Orbit Period: 687 (Earth) days.
- Surface Temperature: -143° to -225°F
- First Record: 14th century BC
- Recorded By: 5134 BCE(ancient Egyptian astronomers)