1. The Planets
Earth Science

2. Mercury Type: Terrestrial Diameter: 0.383
Distance from the Sun (AU):
Mass (Earths):
Atmosphere: Negligible
Unique: Closest to Sun

3. Venus Type: Terrestrial Diameter: 0.949
Distance from the Sun (AU):
Mass (Earths):
Atmosphere: Mostly CO2
Unique: Strong greenhouse effect, spins “backwards”

4. Earth Type: Terrestrial Diameter: 1.0 Distance from the Sun (AU): 1.0
Mass (Earths): 1.0
Atmosphere: N2 and O2
Unique: Supports life

5. Mars Type: Terrestrial Diameter: 0.5326
Distance from the Sun (AU):
Mass (Earths):
Atmosphere: Thin CO2
Unique: Biggest mountain (Olympus Mons)

6. Jupiter Type: Gas Giant Diameter: 11.209
Distance from the Sun (AU):
Mass (Earths):
Atmosphere: H2 and He
Unique: Biggest planet, largest moon “Ganymede”

7. Saturn Type: Gas Giant Diameter: 9.4494
Distance from the Sun (AU):
Mass (Earths):
Atmosphere: H2 and He
Unique: Well-developed rings, most moons incl. Titan.

8. Saturn’s Moon “Mimas”

9. Uranus Type: Gas Giant Diameter: 4.0074
Distance from the Sun (AU):
Mass (Earths):
Atmosphere: H2, He, and CH4
Unique: Lays on it’s side

10. Neptune Type: Gas Giant Diameter: 3.88
Distance from the Sun (AU):
Mass (Earths):
Atmosphere: H2, He, and CH4
Unique: Triton (large moon) orbits “backwards”

11. Pluto Type: Dwarf Planet (Rocks & Ice) Diameter: 0.1783
Distance from the Sun (AU):
Mass (Earths):
Atmosphere: N2 and CH4
Unique: First discovered of a new class of objects