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8 Cards in this Set
- Front
- Back
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Solar system |
system of eight planets and numerous |
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comet |
large body of ice and rock that orbits the sun; develops a bright, glowing tail if it passes close to the sun |
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Astronomical unit |
measure that equals 150 million km, which is the mean distance from Earth to the sun |
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Meteorite |
any rock from space that survives its plunge through the atmosphere and lands on Earth's surface |
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Constellation |
group of stars that forms a pattern in the sky and can be named after a real or imaginary animal, object, or person. |
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Supernova |
very bright explosion of the outer part of a super giant that takes place after it's core collapses. |
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Galaxy |
group of stars, gas, and dust held together by gravity. |
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Light-year |
about 9.5 trillion km- the distance that light travels in one year-which is used to measure large distances between stars or galaxies. |
