Measured ages of globular clusters and a study of the time required for massive stars to build up the present abundance of heavy elements suggests that the universe is
A) at least 20 billion years old.
B) no more than 9 billion years old.
C) at least 13 billion years old.
D) flat.
E) closed.
Correct Answer:
Verified
Q2: The Great Wall
A) is a filament of
Q3: If gravity is unimportant and H equal
Q4: The best determination of the Hubble constant,using
Q5: The age of the universe can be
Q6: The cosmic microwave background radiation contains small
Q7: The universe is said to be closed
Q8: The flatness problem is that
A) the density
Q9: The best scientific data and models suggest
Q10: If a two-dimensional saddle shaped universe
Q11: If a galaxy is found receding from
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