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A study of the planets.

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Characteristics
Planets
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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