active galaxy

noun — 2 senses

active galaxy

noun

1

Astronomy, Natural sciences 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)

Related terms: AGN, active galactic nucleus, BL Lac, BL Lac object, BL Lacertae object
Hypernyms: galaxy
Hyponyms: blazar, LINER, LIRG, Markarian galaxy, quasar, radio galaxy, Seyfert galaxy, starburst galaxy, XBONG

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.