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| the band of colors produced when white light passes through a prism |
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| the brightness that a star as seen from earth |
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| the brightness that a star would have at a distance of 32.6 light yrs from earth |
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| the distance that light travels in one light travels in one year about 9.46 trillion km |
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| an apparent shift in the position of an object when viewed from different locations |
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| the locations 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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| hertzsprung russell diagram a graph that shows the relationship between a star's surface temp. & absolute magnitude |
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| gigantic explotion in which a massive star collapses and throws its outer layer into space |
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| a collection of stars , dusts, and gas boung together by gravity |
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| a large cloud of gas and dust in interstellar space region in space where stars are born |
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| the theory that all matter and energy in the universe was compressed in to an extremely small volume that 13 billion to 15 billion yrs ago exploded and began expanding in all directions |
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