Ball Orbit offers a mix of simplicity and intensity that few arcade games can match. At first glance, the rules are easy: hop from one planet to the next with a single tap. But as the speed increases, ...
Astronomy on MSN
Why don't planets fall into the stars they orbit?
Why don't planets fall into the stars they orbit if they're constantly being pulled by gravity?Lindsey CoughterRocky Mount, North Carolina This is a brilliant question because the notion of an orbit ...
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