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11 Cards in this Set
- Front
- Back
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constellation
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used to designate an area of the sky that contains a specific pattern of stars.
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binary stars
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pairs of stars that are pulled toward each other by gravity
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Parallax
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the slight shifting in the apparent position of a nearby star due to the orbital motion of Earth. (most basic way to measure star distance)
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light-year
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distance light travels in one year, 9.5 x 10^12 (9.5 trillion km).
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apparent magnitude
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a star's brightness as is appears from Earth.
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absolute magnitude
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how bright the actual star is
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red giant
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a large, cool star of high luminosity (a star occupying the upper-right portion of the H-R diagram)
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supergiants
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a very large, very bright red star
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Cepheid variables
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stats that get brighter and fainter in a regular pattern.
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nova
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sudden brightening of a star
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nebulae
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clouds of dust and gases
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