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Definition
| a body that orbits a planet |
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Definition
| an object that orbits the sun, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit |
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Definition
| a streak of light produced when a small object burns up entering Earth's atmosphere |
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Definition
| a cold mixture of dust and ice that gives up a long trail of light as it approaches the sun |
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Definition
| a giant ball of hot gas, mainly composed of hydrogen and helium |
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| a pattern or group of stars that people imagined to represent a figure, animal or object |
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Definition
| an imaginary line that passes through the Earth's center and the North and South poles |
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Definition
| the spinning of Earth on its axis |
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Definition
| the movement of one object around another |
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Definition
| Earth's path around the sun |
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| a system of organizing time that defines the beginning, length, and divisions of a year |
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| either of the two days of the year on which the sun reaches its greatest distance north or south of the equator |
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Definition
| either of the two days of the year on which neither hemisphere is tilted toward or away from the sun |
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| the force that attracts all objects toward each other |
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| law of universal gravitation |
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Definition
| Newton's law that states every object in the universe attracts every other object |
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Definition
| the amount of matter in an object |
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Definition
| the measure of the force of gravity on an object |
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Definition
| the tendency of an object to resist a change in motion |
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Term
| Newton's first law of motion |
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Definition
| states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force |
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Definition
| the different shapes of the moon you see from Earth |
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Definition
| the partial or total blocking on one object in space by another |
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Definition
| occurs when the moon passes directly between Earth and the sun |
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Definition
| the very darkest part of the moon's shadow |
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Definition
| the larger part of the moon's shadow |
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Definition
| occurs at a full moon when the Earth is directly between the moon and the sun |
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Definition
| the rise and fall of ocean water that occurs every 12.5 hours or so |
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Definition
| a tide with the greatest difference between consecutive low and high tides |
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Definition
| a tide with the least difference between consecutive low and high tides |
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Definition
| dark, flat areas on the moon made of hardened rock formed from huge lava flows that occurred 3-4 billion years ago |
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| chunks of rock or dust from space |
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