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What is satellite? Satellite can be divided into following types. Natural and Artificial Satellite 1. The celestial bodies which revolve around the planets in close and stable orbits, are called as Satellite. 2. Our solar system consists of a sun which is stationary at the center of the universe and nine planets which revolve around the sun in separate orbits. The nine planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto . Each of these planets may be called a satellite of the sun. These planets too have got satellites revolving around them. Whereas mercury, Venus and Pluto do not have any satellite, the earth has one, mars and Neptune two each, Uranus five, Saturn ten and Jupiter has twelve. These celestial bodies moving around a planet are called “natural satellites”. Thus, the earth , in an almost circular orbit of radius 3.84 × 10 5  km. 3. Artificial satellite These satellites are launched from the earth so as to move ...