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| the blue whit hot core of a star that is left behind after its outer layers have expanded and drifted out into space |
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| The 2 days of the year on which neither hemisphere is tilted toward or away from the sun |
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| A place that is empty of all matter |
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| The partial or total blocking of one object in space by another |
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| The birlliant explosion of a dying supergiant star |
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| A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere |
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| A chunk of rock or dust in space |
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| The region of the solar system, between the orbits of Mars and Jupiter, where many asteroids are found |
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| A large round pit caused by the impact of a meteoroid |
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| Any object that orbits around another object in space |
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| The force that pulls objects toward eachother |
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| The movement of an object around another object |
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| A natural satellite that revolves around a planet |
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| The periodic rise and fall of the level of water in the ocean |
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| The 2 days of the year on which the sun reaches its greatest distance north or south of the equator |
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| A doughnut shaped region that stretches from beyond Neptune's orbit to about 100 times Earths distance from the sun |
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| A large cloud of gas and dust in sace, spread out in an immense volume |
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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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| All of space and everything in it |
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Definition
| The process by which hydrogen atoms join together in the sun's core to form helium |
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| A unit of measurement equal to Earth's average distance from the sun, about 150 million kilometers |
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| An imagenary line that passes through Earth's center and the North and South poles, about which Earth rotates |
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| A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity |
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| The tendancy of an object to resist any change in its motion |
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| A meteoroid that passes through the atmosphere and hits Earth's surface |
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| The path of an object as it revolves around another object in space |
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| A loose collection of ice, dust, and small rocky particles, typically with a long narrow orbit |
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Definition
| Rocky objects revolving around the sun that are to small to be considered planets |
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| The inner layer of the sun's atmosphere that gives off its visible light |
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| The spinning motion of a planet on its axis |
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| The ouer layer of the sun's atmosphere |
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| A spherical region of comets that surrounds the solar system |
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| One of the different apparent shapes of the moon as seen from Earth |
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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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