Multiple Choice
What is the Tully-Fisher relation?
A) The more distant the galaxy, the greater is the recessional velocity.
B) The brighter the Cepheid, the longer is the pulsation period.
C) The more distant the galaxy, the fainter it appears.
D) The brighter the galaxy, the wider is the 21-cm radio emission line.
Correct Answer:
Verified
Correct Answer:
Verified
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