# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Astro*Dictionary by Michael Erlewine





1 article for "Seyfert Galaxies"

Seyfert Galaxies [Astro*Index]

A small class of spiral galaxies that have very small, intensely bright nuclei whose broad spectral emission lines indicate that the atoms present are in a very high state of activity. They are powerful sources of radio energy, and also of ultraviolet and infrared radiation.

See also: ♦ Galaxy ♦ Electromagnetic Spectrum


Astro*Index Copyright © 1997 Michael Erlewine