Question

what is defenation for planets

Answer 1

Planets are the bodies in the solar system which take round in orbits of sun.

Answer 2

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A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.

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