________ galaxies are essentially featureless; their light reveals evidence for the presence ofonly old red Main Sequence and red giant stars.
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Q51: A galaxy that was once a quasar
Q59: A quasar's spectral lines are:
A)emission lines with
Q60: The Tully-Fisher relation exists between the galaxy's
Q61: A billion solar mass black hole would
Q62: The lobes of a radio galaxy can
Q63: Most active galactic nuclei are powered by:
A)supermassive
Q65: Hubble's Law starts as a plot of
Q66: In color photos, spirals typically have _
Q68: Which of the following does the intensity
Q69: What is true of the lobes of
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