Vocabulary #6

Front

Asteroid

Back

Any numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)

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Comet

Back

A ball of frozen dust and rock that orbits the sun and has a tail that glows

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Gravity

Back

A force of attraction between objects that is due to their masses

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Light year

Back

The distance light travels in one year

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Planet

Back

An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit

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Solar System

Back

The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets

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Galaxy

Back

A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity

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Meteoroid

Back

A small body of rock moving in the solar system that would become a meteor if it entered the earth's atmosphere

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Milky Way Galaxy

Back

The name of our galaxy, a spiral galaxy that contains about 400 billion stars

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Satellite

Back

A natural or artificial body that revolves around a planet or other body in space