The Hubble time is
A) the time it takes a galaxy moving at 1000 km/s to move 1 Mpc.
B) the time it takes the galaxy to double its size.
C) the time since recombination occurred.
D) the time remaining before the universe stops expanding and begins to contract.
E) an estimate of the age of the universe based on the Hubble constant.
Correct Answer:
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Q13: The cosmic background radiation comes from a
Q14: The assumption of isotropy states that
A) the
Q15: The cosmological principle states that the universe
Q16: If the universe is closed and finite,
Q17: The _ view of the universe is
Q19: The assumption of homogeneity states that
A) the
Q20: Space-time will be flat if
A) the universe
Q22: If galaxy A is four times more
Q22: What is the fate of an open
Q23: The age of the universe can be
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