English Explanatory Dictionary

active galaxy

English dictionary entry

Meanings

noun
  1. A galaxy where a significant fraction of the energy output is not emitted by the normal components of a galaxy.
  2. A galaxy with an active nucleus (AGN, active galactic nucleus)

Word forms

active galaxy active galaxies

Related words

AGN active galactic nucleus BL Lac BL Lac object BL Lacertae object
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