Multiple Choice
What is a spectroscopic binary?
A) a spectroscopic binary looks, to us on Earth, like a single star, but its spectrum shows double lines that shift
B) a visual binary for which we have spectra of both stars
C) a visual binary in which one or both stars have peculiar spectra
D) a visual binary that is shown by its spectrum to be a single star
Correct Answer:
Verified
Correct Answer:
Verified
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