The period of variability of a Cepheid variable star, which is easily measured, is directly related to which stellar parameter, thereby providing a reliable method for the measurement of distance to stars?
A) luminosity
B) velocity away from Earth
C) surface temperature
D) surface magnetic field
Correct Answer:
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Q277: What is a Cepheid variable star?
A) one
Q278: What are the stars in the lower
Q279: Cepheid stars are
A) giant stars that pulsate
Q280: A Cepheid variable is a
A) type of
Q281: Which of these statements about a globular
Q283: Where do horizontal-branch stars get their energy?
A)
Q284: What would one expect to find in
Q285: How do the stars in a star
Q286: What is the MOST important use of
Q287: Which of these stars are metal-rich?
A) Population
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