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13 Cards in this Set
- Front
- Back
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astronomer
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A sicentist who studies the universe.
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astronomical unit
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A unit of measure equal to the average distance between the earth and the sun.
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constellation
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A group of stars named for an object,person,or animal.
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galxay
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stars,dust,and gases held together by gravity.
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ligth year
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the distance ligth travels in one year.
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magnitude
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A way to measure the brigthness of a star
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observatory
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A place where astronomers study the sky.
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radio telescope
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A telescope that gathers radio waves from objects in space.
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reflecting telescope
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A telescope that uses mirrors to gather ligth.
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refracting telescope
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A telescope that gathers light with a lens.
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satellite
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An object that circles another object in space.
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space probe
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an unmanned craft sent into space; space probes do not orbit planets or other bodies.
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universe
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everything in space.
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