Tuesday, September 25, 2012

Answer to Question 86

A86: The inner planets are the planets in the inner part of the Solar System that orbit closest to the sun. The 4 inner planets are Mercury, Venus, Earth, and Mars. There are a number of differences between the inner and outer planets aside from location. The inner planets are composed mostly of rock, while the outer planets are gas giants. Generally, inner planets are both smaller and denser than their counterparts.

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