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barry barry
wrote...
Posts: 11630
10 years ago
Why do Newton's Laws show a force must be acting on the planets?
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Replies
wrote...
10 years ago
The planets are moving in elliptical orbits (not a straight line). According to First Law, if no force acts on the body, it must move in a straight line. Since the planets do not, there must be a force acting on them.
Would you know my name, if I saw you in heaven?

Eric Clapton
barry Author
wrote...
10 years ago
Thank you very much, marking this solved. This was from mastering astronomy.
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