Asteroids, Comets, and Meteors Overview

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17 Terms

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Asteroids

Largest objects after sun and planets.

<p>Largest objects after sun and planets.</p>
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Minor Planets

Large asteroids sometimes referred to as this.

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Asteroid Belt

Region between Mars and Jupiter with asteroids.

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Irregular Shapes

Most asteroids are not round like planets.

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Composition of Asteroids

Made from rocks, minerals, gases, and dust.

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Comet

Celestial body with a nucleus and tail.

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Coma

Cloud of dust and gas surrounding a comet's core.

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Comet Tail

Formed from dust and gas released by the comet.

<p>Formed from dust and gas released by the comet.</p>
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Halley's Comet

Comet with a 76-year orbital period.

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Meteor

Shooting star caused by burning space rock.

<p>Shooting star caused by burning space rock.</p>
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Meteorite

Meteor that survives Earth's atmosphere impact.

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Meteor Shower

Occurs when Earth passes through comet debris.

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Lyrids

Meteor shower occurring in April.

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Perseids

Meteor shower occurring in August.

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Orionids

Meteor shower occurring in October.

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Craters

Formed by meteor impacts on Earth's surface.

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Orbital Period

Time taken for a comet to orbit the sun.