Multiple Choice
How much can astronomers learn about a star from a measurement of its apparent magnitude?
A) intrinsic brightness (the total light actually emitted by the star)
B) brightness the star would appear to have if it were exactly 10 pc from Earth
C) brightness of the star as it appears in Earth's sky
D) total output of electromagnetic energy emitted at all wavelengths from the star
Correct Answer:
Verified
Correct Answer:
Verified
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