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16 Cards in this Set
- Front
- Back
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solar system
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a group of planets and their moons that orbit a star
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telescope
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a device used to observe distant objects
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inner planets
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the four planets closest to the sun
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star
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a burning ball of gasses
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rotation
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spin, it takes Earth 24 hours to make one rotation
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phases
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the different shapes of the lit side of the moon
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gas giants
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four of the outer planets that are made up mainly of gasses
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revolution
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one complete trip of one object around another object
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axis
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the imaginary line on which a planet rotates
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orbit
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the path that a planet takes around the sun
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asteroid
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a rocky object that orbits the sun between Mars and Jupiter
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satellite
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an object that orbits another object
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outer planets
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the five planets that are on the outer side of the asteroid
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planet
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a large object that orbits a star
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comet
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an object made up of ice, dust, and gasses that orbits our sun
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space probe
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a space vehicle that is sent into space to explore places too far away for people to visit
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