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According to the Main Sequence Turn-Off Points of the Oldest

Question 73

Multiple Choice

According to the main sequence turn-off points of the oldest globular clusters, they areabout:

A) 4.5 billion years old.
B) 6.8 billion years old.
C) 10 billion years old.
D) 12 billion years old.
E) 16 billion years old.

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