what is planets? The name planet is derived from a Greek word meaning wanderer. Mercury, venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune are the eight planets that revolve around the sun in fixed paths called orbits. They also rotate on their axis while revolving around the sun. These planets do not have their own light but reflect the light from the sun. pluto, the ninth planet of our solar system, was re-categorized as a dwarf planet in 2006. All the planets are spherical in shape, but are of varying sizes. their composition also differs. Mercury, Venus, Earth and Mars are rocky while jupiter, Saturn, Uranus and Neptune are gaseous and liquid. Mercury is the smallest planet and jupiter is the largest. Though Mercury is closest to the sun, it is not the hottest planet. The hottest planet is Venus as it has an atmosphere ...
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