Star clusters are important to our study of stars because
A) all stars formed in star clusters.
B) the sun was once a member of a globular cluster.
C) they give us a method to test the our theories and models of stellar evolution.
D) they are the only objects that contain Cepheid variables.
E) all of the above.
Correct Answer:
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Q2: Stars within a cluster that are at
Q2: If the stars at the turnoff point
Q3: The Crab nebula is
A)a planetary nebula.
B)a Bok
Q6: Helium flash occurs
A) because helium is very
Q8: Which of the following nuclear fuels does
Q9: As a main-sequence star exhausts hydrogen in
Q10: In star clusters, the _ stars are
Q11: A star will experience a helium flash
Q18: Giant and supergiant stars are rare because
A)they
Q20: A(n) _ is a collection of 105
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