Answers

2016-05-06T16:09:29+05:30
Planets have it own orbit through which they revolve around the sun therefore Planets do not collide into one another.
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2016-05-06T16:15:02+05:30
In the solar system, the planet revolve around the sun in their own orbits. They rotate themselves, and revolve around the sun through their own orbits, and so they don't collide with each other.  
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