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| The band of colors when white light passes through a prism. |
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| The brightness of a star as seen from Earth. |
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| The brightness that star would have at a distance of 32.6 light years from Earth. |
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| The distance that light travels in one year; about 9.46 trillion kilometers (km). |
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| An apparent shift in the position of an object when viewed from different locations. |
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| The location on the H-R diagram where most stars lie; it has a diagonal pattern from the lower right to the upper left. |
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| A graph that shows the relationship between the surface temperature and absolute magnitude of a star. |
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| A gigantic explosion in which a massive star collapses and throws its outer layers into space. |
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| A very small but extremely dense ball of neutrons. A single teaspoon matter from this would weight 100 million metric tons on Earth. |
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| An object that is so dense and massive that light cannot escape its gravity. |
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| A collection of stars, dust, and gas bound together by gravity. |
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| Have a bulge at the center and spiral arms. The spiral arms are madde up of gas, dust, and new stars that have formed in these dense regions of gas and dust. |
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| Are round or oval. Some are slightly flattened, but not as much as spiral galaxies are. |
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| Galaxy that does not have no definite shape. |
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| A large cloud of gas and dust in interstellar space; a region in space where stars are born. |
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| A highly concentrated group of stars that look like a ball. |
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| Large clouds of gas--mainly hydrogen and helium--and dust in interstellar space; a region in space where stars are born. |
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| A rotating cloud of gas and dust from which the sun and planets formed. |
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| The process by which 2 or more low-mass nuclei fuse to form another nucleus. |
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| One of the highly dense planets nearest to the sun; Mercury, Venus, Mars, and Earth. |
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| The counterclockwise spin of a planet or moon as seen from above the planet's North Pole; rotation in the same direction as the sun's rotation. |
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| The clockwise spin of a planet or moon as seen from above the planet's North Pole. |
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| A planet that has a deep, masive atmosphere, such as Jupiter, Saturn, Uranus, or Neptune. |
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| A planet that has a deep, masive atmosphere, such as Jupiter, Saturn, Uranus, or Neptune. |
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| A natural or artificial body that revolves around a planet. |
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| The change in the sunlit area celestial body as seen from another celestial body. |
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| An event in which the shadow of one celestial body falls on another. |
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| Happens when the moon comes between Earth and the sun and the shadow of the moon falls on part of Earth. |
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| Happens when Earth comes between the sun and the moon and the shadow of the Earth falls on the moon. |
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| A small body of ice, rock, and cosmic dust that follows an elliptical orbit around the sun and that gives off gas and dust in the form of a tail as it passes close to the sun. |
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| A small, rock that orbits the sun; most of these are located in a band between the orbits of Mars and Jupiter. |
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| A relatively small, rocky body that travels through space. |
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| A bright streak of light that results when a meteoroid burns up in Earth's atmosphere. |
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| A meteoroid that reaches Earth's surface without burning up completely. |
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