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Definition
| a measure of the amount of light received by Earth from a star or other object—that is, how bright an object appears in the sky, as contrasted with its luminosity |
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Term
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Definition
| the rate at which a star or other object emits electromagnetic energy into space; the total power output of an object |
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Term
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Definition
| an older system of measuring the amount of light we receive from a star or other luminous object; the larger the magnitude, the less radiation we receive from the object |
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Term
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Definition
| difference between the magnitudes of a star or other object measured in light of two different spectral regions—for example, blue minus visual (B–V) magnitudes |
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