In the Solar System
Earth
The only planet known to carry life, and the only one whose surface holds liquid water in bulk: 71% of it is ocean. An atmosphere of nitrogen and oxygen keeps it some 33 °C warmer than bare sunlight would and stops most of what falls towards it, and a magnetic field turns aside the solar wind that stripped Mars. Everything else on this map is measured from here.
- Radius
- 6,378 km
- Turns once in
- 23 h 56 m
Everything the map shows is worked out in your browser from published orbital data - nothing on it is a stored picture of where things were.