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20 Cards in this Set
- Front
- Back
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explanation for the beginning of the universe
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Big Bang Theory
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relatively cool star that has expanded to more than 700 times as large as our sun
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supergiant
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groups of stars whose positions inthe sky seem to change as Earth moves
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constellations
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distance that light travels in one year
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light years
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lowest layer of the Sun's atmospher that gives off light
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photospher
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classification of about 90 percent of the stars
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main sequence
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actual amount of light a star gives off
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absolute magnitude
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two or more stars revolving around one another
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binary system
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produced from an explosion that occurs when a star's core collapses
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supernova
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star in which only neutrons can exist in its core
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neutron star
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earliest stage of a star's formation
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nebula
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amoutn of star's light observed on Earth
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apparent magnitude
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large, cool expanding star in wich helium fuses to form carbon
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giant
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objet so dense that nothing, including light can escape it
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black hole
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layer of the sun's atmosphere above the potosphere
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chromophere
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large group of stars, gas, and dust held together by gravity
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galaxy
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apparent shirft in poition of an object when viewed from different places; used to determine distance
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parallax
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small hot star consisting fo a hot, dense core contracting under the forc of gravity
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white dwarf
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dark, cooler areas of the Sun's surface
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sunspots
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outer layer and largest part of the Sun's tmosphere
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corona
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