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11 Cards in this Set
- Front
- Back
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astronaut
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a person who is trained to travel into space
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axis
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an imaginary line that goes through the middle of an object
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moon phase
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the way the moon appears depending on how much of its sunlit surface is visible from the earth
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orbit
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the path that an object follows as it revolves around another object
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planet
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a large body of rock or gas that orbits the sun
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probe
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an unmanned spacecraft sent into space to collect information
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revolution
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the movement of one object around another object
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rotation
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the spinning of an object on its axis
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satellite
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an object that revolves around a larger object in space
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solar system
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the sun and all the objects that revolve around it
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telescope
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an instrument that is used to observe faraway objects by making them appear larger and closer
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