Multiple Choice
By comparing globular clusters, you find that Cluster A's RR Lyrae stars are 100 times fainter than Cluster B's RR Lyrae stars.You know that both clusters have approximately the same chemical composition and age, and thus their RR Lyrae stars should have the same luminosities.Which is true about the clusters' distances?
A) Cluster A is 10 times farther away than Cluster B.
B) Cluster A is 10 times closer to us than Cluster B.
C) Clusters A and B are approximately the same distance from us.
D) Cluster A is 100 times farther away than Cluster B.
E) Cluster A is 100 times closer to us than Cluster B.
Correct Answer:
Verified
Correct Answer:
Verified
Q32: The most distant galaxy observable with the
Q33: The presence of dwarf galaxies in orbit
Q34: Astronomers expect stars near the edge of
Q35: The Milky Way appears as _ in
Q36: What are the major differences between globular
Q38: Measurements show that globular clusters contain very
Q39: Why do members of the Local Group
Q40: How have astronomers measured the mass of
Q41: If you find a halo star that
Q42: Compared to the Sun's stellar neighborhood, globular