Astronomy Terms

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Moon

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A celestial body that orbits a planet.

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Mini-planet

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A term not commonly used in astronomy to describe small planetary bodies.

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Asteroid

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A rocky body smaller than a planet which is orbiting the sun.

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Star

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A celestial body that emits light and heat from nuclear reactions at its core.

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Exoplanet

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A planet that orbits a star outside our solar system.