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  4. As observed from earth, the sun appears to move in an approximate circular orbit. For the motion of another planet like mercury as observed from earth, this would

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Q. As observed from earth, the sun appears to move in an approximate circular orbit. For the motion of another planet like mercury as observed from earth, this would

Gravitation

Solution:

As observed from the earth, sun appears to move around the earth in a circular orbit though in reality earth moves around the sun due to gravitational force between them. All planets move around the sun due to huge gravitational force of the sun acting on them. The gravitational force on mercury due to earth is much smaller as compared to that acting on it due to sun and hence it revolves around the sun and not around the earth.