Pluto
- Discovered in [1930
- Position calculated from gravitational theory
- Discovered by Clyde Tombaugh
- Located 39.5 AU from the Sun
- Cold
- -228Ëš to -238Ëš Celsius
- Terrain
- Very diverse
- Mountains
- Frozen plains
- Thin atmosphere of carbon monoxide, nitrogen
- It freezes when Pluto is farther from the sun and sublimates when it is close
- Tidally locked with Charon
- Double tidal lock