Multiple Choice
You observed three different star clusters and found that the main-sequence turnoff stars in Cluster 1 had spectral type A,the main-sequence turnoff stars in Cluster 2 had spectral type B,and the main-sequence turnoff stars in Cluster 3 had spectral type G.Which star cluster is the youngest?
A) Cluster 1
B) Cluster 2
C) Cluster 3
D) It is impossible to determine their ages given only the spectral types.
Correct Answer:
Verified
Correct Answer:
Verified
Q4: The event horizon of a black hole
Q5: An iron core cannot support a massive
Q8: Which of the following is NOT a
Q10: As a high-mass main-sequence star evolves off
Q11: Using the Hubble Space Telescope,you discover a
Q12: The Type II supernova that created the
Q13: Photons have no mass,and Einstein's theory of
Q14: Why do large,high-mass main-sequence stars never become
Q15: High-mass stars differ from low-mass stars in
Q90: Galileo supposedly experimented with gravity by dropping