Mars
Mars is the fourth planet from the Sun and is often called the Red Planet due to its reddish appearance.
Mars has the largest volcano and canyon in the solar system. Scientists believe that Mars once had liquid water and could have supported life.
Mars facts
- Diameter: 6,779 km
- Mass: 6.42 × 1023 kg
- Moons: 2 (Phobos and Deimos)
- Orbit distance: 227.9 million km
- Orbit period: 687 Earth days
- Surface temperature: −125°C to 20°C
- First record: 2nd millennium BC
- Recorded by: Ancient Egyptian astronomers