Multiple Choice
Why do we know that at least one generation of stars formed and died before the Milky Way's globular clusters formed?
A) All globular clusters reside in the disk of the Milky Way.
B) No globular cluster has zero heavy elements.
C) Globular clusters are 9-10 billion years old.
D) No globular cluster is older than 12 billion years.
Correct Answer:
Verified
Correct Answer:
Verified
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