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10 Cards in this Set
- Front
- Back
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the visible surface of the sun
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photosphere
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the sun's atmosphere
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corona
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a dark spot on the photosphere of the sun
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sunspot
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a brief burst of energy from the sun's photosphere
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solar flare
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a fast-moving stream of particles thrown into space by solar flares
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solar wind
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brightnes of stars
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magnitude
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a band of stars that includes most stars of average color, size, and temperature
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main sequence
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everything that exists- planets, stars, dust, gases, and energy
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universe
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a group of stars, gas, and dust
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galaxy
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the distance light travels in one earth year; about 9.5 trillion km
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light-year
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