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| sections of the sky that contain recognizable star patterns. |
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| are stars seen at all times of the year and all times of the night. |
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| millions of colors of white light |
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| a spectrum that shows all colors of light |
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| an instrument used to break a star's light into a spectrum. The spectrum gives astronomers information about the composition and temperature of a star. |
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| lines that are made when certain wavelengths, or color, of light given off, or emitted, by hot gases. Each element has its own set of bright emission lines which are like fingerprints for the element. |
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| a spectrum that is produced when light from a hot solid passes through a cooler gas. |
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| is the actual brightness of a light; this is a combination of a star's apparent magnitude and its distance from Earth. |
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| a stars apparent shift in position; stars near Earth seem to move compared with more-distant stars as Earth revolves around the sun |
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| Hertzsprung-Russell diagram or H-R diagram |
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| diagram created by combining the work of an astronomer named Ejnar Hertzsprung and Henry Norris Russell that is a graph showing the relationship between a star's surface temperature and its absolute magnitude (actual brightness) |
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| the diagonal pattern of stars in an H-R diagram |
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| the death of a large star by explosion |
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| a star in which nearly all the particles have become neutrons. |
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| is an object with more than 3 times mass of the sun squeezed into a ball only 10kn across |
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