active galaxy
An "active galaxy" is notable for its energetic core, often powered by a supermassive black hole, emitting across various wavelengths.
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Definition
C1Astronomy
(technical)A galaxy with a core that emits significant energy, often due to a supermassive black hole.
Example
- Scientists observed an active galaxy emitting powerful X-rays from its core.
- The active galaxy's nucleus outshines the rest of its stars.
C1Astrophysics
(technical)A galaxy where non-stellar processes, such as accretion onto a central black hole, produce intense radiation.
Example
- Active galaxies are key to studying the early universe and the formation of massive black holes.
Similar
Terms that have similar or relatively close meanings to "active galaxy":