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A meteoroid is a
tiny particle up

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to boulder size out in space.

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And it can be a
piece of an asteroid.

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A piece of a comet.

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Or in rare cases, a piece
of a planet like Mars.

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So this meteoroid is
this object out in space.

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But when it comes near the
Earth and hits the Earth's

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atmosphere, it burns up.

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Or mostly burns up.

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And it leaves that streak
of light in the sky.

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And we call that a meteor,
or a shooting star.

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And the meteor doesn't
refer to the object.

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It doesn't refer to the
rock, the meteoroid.

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It refers to the streak
of light you see.

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So a streak of light in
the night sky is a meteor.

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And if it's big
enough and it moves

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slow enough-- real
slow for meteors.

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And I'm talking like
30,000 miles per hour,

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which is slow for a meteor.

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And makes it to the ground.

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That's a meteorite.

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So a meteorite is the rock
you pick up off the ground.

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And that's what a lot
of people look for.

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You know, they get all
excited about finding

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a meteorite on the ground.