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| look through a white light you see rainbow colors called a spectrum |
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| lines that are made when certain wave lengths of light, or color, are given off by hot gases |
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| stars atmosphere absorbs colors of light instead of emmitting them. |
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| what did early astromomers call the brightest stars |
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| what did early astronomers call the dimmest stars |
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| the brightness of a star or light from earth (sun -26.8) |
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| is the actual brightness of a star (+4.8) |
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| distance light travels in one year |
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| star's apparent shift in position |
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| star that expands and cools once it uses all of its hydrogen (can be 10 times larger than the sun or 100 times) |
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| small hot star that is the leftover center of an older star (has no hydrogen left and no long creates HE) |
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| graph that shows the relationship between a stars surface temp. and its absolute magnitude |
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| the diagonal pattern on the H-R diagram where most stars lie |
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| gigantic explosion in which a massive star collapses and throws its outer layers into space |
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| a star that has collapsed under gravity to the point at which all of the star's particles are neutrons |
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| a neutron star that is spinning |
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| an object that is so massive that light cannot escape its gravity |
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| Large group of stars, dust, gas |
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| have a bulge at the center and spiral arms |
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a galaxy that has massive blobs of stars
they look like spheres |
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| galaxies that dont fit into any other class |
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| lg. clouds of gas and dust |
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| group of stars that look like a star |
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| groups of closely grouped stars that are usually located along the spiral arms of a galaxy |
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| starlike sources of light that are extremely far away. are among the most powerful energy source in the world |
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