Astronomy Terms

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Supernova

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A super bright explosion of a dying massive star

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Star

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A large sphere or super hot plasma that gives off light

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Galaxy

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A system of millions to billions of stars, dust, and gas clouds

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Moon

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A natural object that orbits a planet

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Lightyear

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A distance that light can travel in one year, or 9.5 trillion kilometers

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Planet

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A large round body that orbits a star and has a clear orbit

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Gravity

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The force of attraction between objects with mass

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Heliosphere

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The area of the solar system under the sun's gravitational influence

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Asteroid

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A massive chunk of rock that orbits the sun

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Shooting Star

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A meteor when oxygen in the air burns it up