The _____ of quasars imply that they must be at great distances, some farther away than any known galaxy.
A) large redshifts
B) small redshifts
C) large blueshifts
D) small blueshifts
Question 2Which of the following is the most precise method for measuring the mass of a galaxy?
A) The parallax method
B) The rotation curve method
C) The visual field test
D) Colorimetry
Question 3_____ are the most distant visible objects in the Universe.
A) White dwarf stars
B) Quasars
C) Red giant stars
D) Pulsars
Question 4According to the Hubble law, the relationship between the distances to galaxies and the apparent velocity of recession is _____.
A) linear
B) exponential
C) quadratic
D) inverse
Question 5In the context of the unified model of active galactic nuclei (AGN), you see jets of gas and radiation emerging perpendicular to the accretion disk of an AGN and coming straight at you if:
A) the accretion disk is tilted at an angle of 30 degrees to your line of sight.
B) you look directly into the central cavity around the black hole.
C) you view the accretion disk from its edge.
D) the accretion disk is tilted at an angle of 60 degrees to your line of sight.
Question 6A__________is an otherwise normal spiral galaxy with an unusually bright, small core that fluctuates in brightness.
A) pulsar
B) blazar
C) Seyfert galaxy
D) Markarian galaxy
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