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Why is every star not called a planet?

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Answer 2: A planet is usually defined as an object (which might be solid, liquid, gas, or a combination of all three) which is too small to produce nuclear fusion (which is the process by which the sun burns) and which orbits a star. read more

A planet is usually defined as an object (which might be solid, liquid, gas, or a combination of all three) which is too small to produce nuclear fusion (which is the process by which the sun burns) and which orbits a star. The Earth is an example of a planet and orbits the sun, which is a star. read more

A star is called a "sun" if it is the center of a planetary system. A large number of planets have been found that orbit other stars, thus making these stars officially "suns." Chances are that a large percentage of the stars in the galaxy also have planets orbiting them, which would make them suns as well. read more

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Attention QVC Shoppers, The Moon Is A Planet
Source: forbes.com