Moons(Satellite) and Dwarf planet

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Moons(Satellite) :

The celestial bodies that revolve around a planet without independently revolving around the sun are called satellites. Like planets, satellites rotate around their respective axes. The Moon is the satellite of the earth. It does not have an atmosphere. Its periods of rotation and revolution are both of 27.3 days. Except for Mercury and Venus all other planets have satellites but in varying numbers.

The earth’s moon spin has been slowed by gravitational interaction with both the sun and Earth, so that its rotational speed equals that at which its revolve around the earth. Thus, the same side of moon constantly faces earth.

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Dwarf planet : A small sized celestial body that revolves independently around the sun is called a dwarf planet. A celestial body like Pluto, Ceres (found in the asteroid belt) and Eris (found in Kuiper belt)  can be classified as a dwarf planet. Pluto takes around 248 years to complete its revolution around the sun whereas it takes around 6.38 days for one rotation

( Asteroid belt:- A nearly flat ring orbiting the sun between the orbits of Mars and Jupiter composed of rocky small bodies, each about 1000 km in diameter.

Kuiper belt:- A flat ring of icy small bodies that revolve around the sun beyond the orbit of the planet Neptune.)

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