What do peculiar velocities reveal?
A) the amount of dark matter in a galaxy
B) the distribution of dark matter in large-scale structures
C) the composition of dark matter
D) the error in our observations of Hubble's law
E) the critical density of the universe
Correct Answer:
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Q17: What is the mass-to-light ratio for the
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Q19: A large mass-to-light ratio for a galaxy
Q20: Which of the following particles are baryons?
A)electrons
B)neutrinos
C)protons
D)quarks
E)photons
Q21: Based on current evidence concerning the amount
Q23: Which of the following are candidates for
Q24: What fraction of the mass needed to
Q25: What is the evidence for an accelerating
Q26: What are peculiar velocities?
A)velocities perpendicular to our
Q27: If all the "dark matter" in the
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