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Myths and Other Misconceptions


BSG CORP
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Well in reality an observer (say you) and another object (say earth) orbit around thier combined centre of mass, which if we take a reference frame rotating such that the relative angle of the line of centres of the two masses is constant in the reference frame, then they just stay a constant distance apart and theres no reason to assume there is a force acting on either.

 

But then when you consider the fact that a third object (the sun) is orbitting us, both our observer-earth system and the sun must be accelerating towards each other to maintain an elliptical orbit.

 

So whilst the first of my two paragraphs is entirely theoretical (and wrong), the second paragraph shows the truth by drawing from reality

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