Some quasars show absorption spectra with a smaller redshift than their emission spectra. This indicates that
A) they are much closer than previously thought.
B) there is cooler gas between us and the quasar.
C) we still don't understand redshifts.
D) their black holes are still contracting.
E) their black holes are still expanding.
Question 2
Redshift surveys give us
A) a 3-D layout of galaxies in space.
B) a better value of the speed of light.
C) an idea of how turbulent the intergalactic gas is.
D) the total mass of the universe.
E) a more accurate census of the Local Group.
Aquatic microclimates: aquatic environments generally show less temperature variation compared to te
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