Planet
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Solar System
Our solar system contains eight major planets, including Earth, that orbit the sun. Jupiter is the largest planet in our solar system.
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Not a Star
Planets shine by reflecting light from their star, unlike stars which produce their own light. At night, planets in the sky look like stars but don't twinkle as much.
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Non-Scientific Use
The word 'planet' can be used metaphorically to suggest a realm or area of interest. In the world of fashion, she lived on a different planet.