What makes the earth spinning around the sun?

What makes the moon orbit the earth; what makes the earth orbit the sun; what makes our galaxy rotate? I guess my question is, what makes "bodies" in the space rotate, and where does it get that kind of energy? PS: Any branch of science can be used to answer if possible; however, physics answer is much... show more What makes the moon orbit the earth; what makes the earth orbit the sun; what makes our galaxy rotate? I guess my question is, what makes "bodies" in the space rotate, and where does it get that kind of energy?

PS: Any branch of science can be used to answer if possible; however, physics answer is much more welcoming.
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