active galaxy

Also found in: Encyclopedia, Wikipedia, Hutchinson

0.02 sec.

active galaxy

(Astronomy) a galaxy that emits usually large amounts of energy from a very compact central source, such as Seyfert galaxies, radio galaxies, and quasars Also called active galactic nucleus

active galaxy

A galaxy emitting unusually high quantities of radiation from an active galactic nucleus at its center. Some active galaxies emit more energy in radio wavelengths than they do visible light. Seyfert galaxies are examples of active galaxies. See more at galactic nucleus.

How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.

?Page tools

Printer friendly
Cite / link
Email

Feedback
Add definition

? Mentioned in

? References in periodicals archive

AGN
BL Lac object
galaxy

jet
Seyfert galaxy
Virgo

The investigators hope to detect high-energy neutrinos released in astrophysical events such as the cataclysmic gravitational collapse of a star or the accretion of matter in the massive core of an active galaxy.

Putting neutrino detection on ice by Science News

And when the galaxy is the nearest active galaxy to us, Centaurus A, which also happens to be one of the strongest and longest studied celestial sources of radio waves, the combination provides a rather unique excitement for astronomers.

Serendipity: supernova in Centaurus A by Thomsen, Dietrick E. / Science News

More results

Dictionary/thesaurus browser

? Full browser

active citizen
active communications satellite
active defense
active duty
active duty for special work
active duty for training
active galactic nucleus
active galaxy
Active Guard and Reserve
active homing guidance
Active hyperaemia
active immunity
active list
active margin
active material

Active Flow
Active Force User
Active Format Description
Active Format Descriptor
Active Format Descriptor
Active Framework for Data Warehousing
Active Frequency-Selective Surface
active front
Active Front End
Active Front Steering
Active Fuel Length
Active Fuel Management
Active fund management
Active Fund of Knowledge of a Student
Active gain medium
Active galactic nuclei

Active galactic nuclei
Active galactic nucleus
Active galactic nucleus
Active galactic nucleus
Active galactic nucleus
Active galactic nucleus
Active galaxies
Active galaxies
active galaxy
Active Galaxy Nuclei
Active Galaxy Nuclei
Active galaxy nucleus
Active galaxy nucleus
Active Geological Fault
Active Geophysical Rocket Experiment
active giving
active glacier

Active Guard and Reserve
Active Guard and Reserve
Active Guard Reserve
Active Guard Reserve Management Information System
Active Guard Reserve/Full-Time Support
Active Guard/Reserve Entry Training
Active Handling System
Active Harmonic Load-Pull
Active Head Restraint
Active Heave Compensation
Active heave compensator
Active heave compensator
Active heave compensator
Active Hemicellulose Compound
Active Hexose Correlated Compound
Active Hexose Correlated Compound

Dictionary, Thesaurus, and Translations

Free Tools:	For surfers: Free toolbar & extensions \| Word of the Day \| Help For webmasters: Free content \| Linking \| Lookup box \| Double-click lookup \| Partner with us

All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.