Astronomy Chapter 14
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a galaxy that is a strong source of radio signals
a galaxy whose center emits large amounts of excess energy often in the form of radio emission
active galaxy nuclei
the centerrs of active galaxies that are emitting large amounts of excess energy
an otherwise normal spiral galaxy with an unusual bright, small core that fluctuates in brightness
small, powerful sources of energy believed to be the active cores of very distant galaxies
the theory that double radio lobes are produced by pairs of jets emitted in opposite directions from the centers of active galaxies
in radio astronomy, a bright spot in a radio lobe
an attempt to explain the different types of active galactic nuclei using a single model viewed from different locations
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