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Difference between Planet and Satellite The main difference between a planet and a moon is that the planet is a celestial sphere in which a star or stellar debris orbits directly. A satellite is a man-made object placed in orbit. Planet Satellite By modern definitions, any celestial body orbiting a star can be classified as a planet. Natural and artificial moons orbit planets or other relatively large celestial bodies. The planet’s axis is bent at an angle to the equatorial plane of its star. This causes the amount of light received in the hemisphere to vary during the period of its rotation. It is believed that satellites orbiting planets in circular orbits are believed to have formed from a collision between two celestial bodies. The word “planet” is derived from the Greek word, that is “planon”. The word ‘satellite’ is derived from the Latin word ‘satellites’, which means ‘follow’ or ‘participate’. Planets revolve around invisible axes around their centers. Most of the planets in th