Dictionary term
Active Galactic Nucleus
Direct answer
Active Galactic Nucleus: An Active Galactic Nucleus is a compact luminous galaxy center powered mainly by matter accreting onto a supermassive black hole.
It is an exceptionally energetic galactic core.
It is an exceptionally energetic galactic core.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.Quick reference
- Use when
- Classify with spectra, variability, radio emission, and viewing geometry.
- Do not use it for
- The black hole itself does not shine; nearby matter produces the observed power.
- Reference category
- Astronomy & Skywatching
- Related terms
- Elliptical Galaxy, Irregular Galaxy, Quasar, Gravitational Lensing
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The story behind Active Galactic Nucleus
Radio and spectroscopic surveys connected quasars, Seyferts, and related objects through accretion physics.
Active Galactic Nucleus in spiritual tradition
Immense brightness can arise from matter falling into darkness.
Active Galactic Nucleus: fact and faith, kept distinct
This is a factual astronomy reference. It can support wonder at the created order without becoming a claim of fate, worship, or private revelation.
Active Galactic Nucleus in numerology
Active Galactic Nucleus is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Active Galactic Nucleus matters
It can outshine its host and launch jets while probing black-hole growth.
Active Galactic Nucleus at work: an example
Gas in an accretion disk converts gravitational energy into radiation before reaching the event horizon.
Where interpretation stops
Active Galactic Nucleus is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
Sources and editorial method
Research references used for this entry include:
- NASA Science: Galaxies - NASA overview of galaxy structure, types, groups, clusters, and the Milky Way.
- NASA Science: Black Holes - NASA reference for black-hole properties, accretion, detection, and gravitational effects.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Also appears in
- Astronomy & Skywatching
- Aliases
- None listed
- Last updated
- 2026-07-16
Investigate an active galaxy core
Active Galactic Nucleus in a book is one thing; Active Galactic Nucleus in your own birth chart is your life. The Oracle casts your real chart and tells you what it means for your love, your work, and your year ahead, in conversation, free.
Speak with the OracleRelated terms
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Common questions
What is Active Galactic Nucleus?
An Active Galactic Nucleus is a compact luminous galaxy center powered mainly by matter accreting onto a supermassive black hole.
How is Active Galactic Nucleus used in an almanac?
Classify with spectra, variability, radio emission, and viewing geometry.
What should I avoid when interpreting Active Galactic Nucleus?
The black hole itself does not shine; nearby matter produces the observed power.
