An exceptionally large meteor may not burn up completely in the atmosphere. If part of a meteor hits the ground, it becomes known as a ''[[meteorite]]''.
An exceptionally large meteor may not burn up completely in the atmosphere. If part of a meteor hits the ground, it becomes known as a ''[[meteorite]]''.
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A major source of meteors lies between [[Mars]] and [[Jupiter]], an enormous cluster of meteoroids also known as the [[asteroid belt]]. Another large cluster of meteoroids lies just outside of our solar system and is known as the [[Kuiper Belt]]. Other (minor) meteoroid belts and clouds exist, and when the [[Earth]] passes through them periodic [[meteor shower]]s occur, such as the [[Perseiids]], [[Geminids]], and [[Taurids]].
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A major source of meteors lies between [[Mars]] and [[Jupiter]], an enormous cluster of meteoroids also known as the [[asteroid belt]]. Other (minor) meteoroid belts and clouds exist, and when the [[Earth]] passes through them periodic [[meteor shower]]s occur, such as the [[Perseiids]], [[Geminids]], and [[Taurids]].
Earth's orbit is far inside the belt between between Mars and Jupiter; another lies just outside of our solar system.
Earth's orbit is far inside the belt between between Mars and Jupiter; another lies just outside of our solar system.
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There are currently several hundred known [[asteroid]]s, called Apollo asteroids, that are in Earth-crossing orbits.
There are currently several hundred known [[asteroid]]s, called Apollo asteroids, that are in Earth-crossing orbits.
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==Meteors and asteroids==
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Meteors are smaller than asteroids, a distinction that may seem arbitrary.
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A large cluster of asteroids lies at the outskirts of our solar system and is known as the [[Kuiper Belt]].