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| The study of the moon, star, and other objects in space. |
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| the imaginary line that passes through earths center and the north and south poles. |
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| the spinning of earth on its axis. |
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| the movement of one object around another. |
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| when the sun is farthest north or south of the equator. |
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| the force that the moon towards keeping it in orbit. |
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| law of universal gravitation |
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| a law that states that every object in the universe attracts every other object. |
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| the amount of matter in an object. |
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| the force of gravity on an object. |
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| the tendency of an object to resist change in motion. |
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| Newtons first law of motion |
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Definition
| the scientific law that states that an object at rest will stay at rest and an object an object in motion will stay in motion. |
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| the different shapes of the moon you see from earth. |
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| the partial or total blocking of one object in space by another |
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| the blocking of sunlight to earth that occurs when the moon is directly between the sun and earth. |
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| the very darkest part of the moons shadow. |
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| the larger part of the moons shadow. |
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| the blocking of sunlight to the moon that occurs when earth is directly between the sun and the moon. |
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| the rise and fall of ocean water. |
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| the greatest difference between consecutive low and high tides. |
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| the smallest difference between consecutive low and high tides. |
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| a device built to observe distant objects by making them appear closer. |
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| dark flat areas on the moon. |
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| chunks of rock from space. |
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| a device that expels gas in one direction to move forward. |
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| the amount of force that it takes to repel something backwards. |
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| speed in a given direction. |
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| the velocity a rocket must achieve to establish an orbit around earth. |
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| the velocity a rocket must reach to fly of into space. |
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| an object that revolves around another object in space. |
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| a spacecraft that can land then fly again. |
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| a large artificial satellite on which people can live and work for long periods. |
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| a space craft that caries scientific instruments that can collect data, but has no human crew. |
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