Planetology
21April
Planetology
Mars is not just any celestial body, it has become a geological and geographical object.
Outside the Earth, Mars is now the planet that is the best-known celestial body. This is because
Planetology:
- Between 206 and 249 million km from the Sun
- Orbit of Mars Between 57 and 100 million km from that of the Earth
- 1/10th of the mass of the Earth
- 144 million km2 (land mass on Earth 148 million)
- Average atmospheric pressure: 610 pascals (6.1 mbar)
- Phylosian (-4,56 à -4,3 Gy) ; Theiikian (=> -3,2 Gy) ; Sidérikian
- Day (“sol”) 24h39 ; year 667 sols ; obliquity 25°19
- Sun Irradiance : 492 to 715 W/m2