According to the turn- off points of the oldest globular clusters, they are about
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.
Correct Answer:
Verified
Q66: Before the decoupling,
A) deuterium produced electrons and
Q67: What key event happened during the decoupling
Q68: The Big Bang formed
A) only helium.
B) only
Q69: If the density of the universe is
Q70: What temperature has the Big Bang cooled
Q72: Concerning dark energy, we do know
A) that
Q73: With a Hubble constant of 70 km/sec/Mpc,
Q74: If ▲o is less than one, then
A)
Q75: What is the meaning of a "closed"
Q76: The expansion rate of the universe is
A)
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