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| Characteristics |
 |
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| Planets |
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| Thought to be a double planet, only outer planet with a rocky core, only planet discovered by an American |
Pluto |
| Closest to the sun, no moons, 2nd smallest, may have shrunk, veiwed by Mariner 10 |
Mercury |
| Great Red Spot, at least 28 moons, outer planet, veiwed by Voyager and Galileo |
Jupiter |
| Spins on its side, blue, with faint rings |
Uranus |
| Only planet with liquid water and life |
Earth |
| Olympus Mons, red planet, several landers including: Mariners, Surveyor, Pathfinder, Voyager |
Mars |
| Earth's "sister planet", greenhouse effect, veiwed by Venera and Magellan |
Venus |
| Rings, gas giant, 30 moons, visted by Voyager |
Saturn |
| 8th but sometimes 9th planet, methane atmosphere, blue green color, 8 moon (triton is one) named for a sea god |
Neptune |
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Ch.18 LTI-MA 509
