Are Aliens real? Is it possible that life on other planets is real and we (the people of Earth) just not know it?
September 11, 2021scientific method
September 11, 2021
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Revolution means one complete rotation, about a point for a point and about an axis for a system.
Revolution and rotation are synonyms, in the sense that both mean turning round a center. Yet, revolution means one complete rotation. Period of revolution means period of one complete rotation.,
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