The minimum period of light variations are used to find the _ _ of the central engine in galactic cores.
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Q117: Hubble divided the spirals into normal and
Q118: The radio lobes of active galaxies can
Q119: Of all the active galactic nuclei, the
Q120: Intermediate between E7 and Sa galaxies, _
Q121: A galaxy with a blueshift is moving
Q123: Some giant elliptical galaxies are found to
Q124: The combined of the Local Group binds
Q125: The central engine for active galaxies is
Q126: Dividing a distant galaxy's velocity by its
Q127: At the top of the distance ladder
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