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Cyber Warrior
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Join Date: Oct 2002
Location: Newcastle upon Tyne
Posts: 10,280
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Cyber Warrior
Join Date: Oct 2002
Location: Newcastle upon Tyne
Posts: 10,280
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According to the article
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They key is that the material was tossed into a high enough orbit, above what's known as the synchronous orbit. This is where the Moon completes an orbit slower than the Earth takes to rotate once. Since the Moon ended up higher than this orbit, it's spiraling outward. If its orbit was less than the length of a day, it would spiral inward.
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