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staedtler staedtler
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8 years ago
The luminosity of a star is
A)   its brightness as seen by people on the Earth.
B)   its brightness if it were to be at a distance of 10 pc (32.6 ly) from the Earth.
C)   its total energy output into all space.
D)   another name for its color or surface temperature.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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hyponoticahyponotica
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8 years ago
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staedtler Author
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8 years ago
I really appreciate your help!
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