Multiple Choice
How is a luminosity class assigned to a star?
A) By combining the apparent magnitude with the star's parallax.
B) By measuring the period of variability in the star's apparent magnitude.
C) By studying the absorption lines in the spectrum of the star.
D) By observing the angular size of the star's image in a photograph or digital image.
Correct Answer:
Verified
Correct Answer:
Verified
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