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13 Cards in this Set
- Front
- Back
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astronaut
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a person who travels in space
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axis
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an imaginary straight line through the center of the Earth. Earth rotates round this line.
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crater
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a large hole in the ground that is shaped like a bowl
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orbit
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the path an object follows as it moves around another object
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phase
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the shape of the lighted part of the moon
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planet
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a large body of matter (stuff) that moves around a star such as the sun
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revolution
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movement of an object in an orbit around another object
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rotate
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to spin on an axis
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satellite
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an object that revolves around another object
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solar system
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the sun, the planets and their moons, and other objects that move around the sun
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star
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a very large mass of hot, glowing gases
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telescope
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an instrument used to make distant objects appear nearer and larger
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tide
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the rise and fall of the ocean, mainly due to the moon's gravity
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