What is the evidence for an accelerating universe?
A) White-dwarf supernovae are the same brightness regardless of redshift.
B) White-dwarf supernovae are slightly brighter than expected for a coasting universe.
C) White-dwarf supernovae are slightly dimmer than expected for a coasting universe.
D) The Andromeda Galaxy is moving away from the Milky Way at an ever-increasing speed.
E) There is far more dark matter than visible matter in the universe.
Correct Answer:
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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
Q22: What do peculiar velocities reveal?
A)the amount of
Q23: Which of the following are candidates for
Q24: What fraction of the mass needed to
Q26: What are peculiar velocities?
A)velocities perpendicular to our
Q27: If all the "dark matter" in the
Q28: Recent measurements of the expansion rate of
Q29: How do astronomers create three-dimensional maps of
Q30: Which of the following is an example
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