external galaxy

external galaxy

[ek¦stərn·əl ′gal·ik·sē]
(astronomy)
Any galaxy known to exist, besides the Milky Way.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Summer and winter are poor seasons for galaxies other than our Milky Way, but by September the visually greatest external galaxy, M31, is high enough for good evening views.
The brightest external galaxy to be found in Cetus is Messier 77--the only Messier object in the constellation.
This is the sharpest visible-light image ever made of the nucleus of an external galaxy.
M31 is the easiest external galaxy to observe, and the view will only get better as Andromeda and the Milky Way move toward a collision and merger in about 4 billion years.
The ongoing starburst not only makes M82 the brightest external galaxy in infrared light, it's been a major factor in shaping it into the highly disturbed object we see today.
Fesen (University of Colorado) and colleagues have recovered the visible remains of S Andromedae, the first supernova ever recorded in an external galaxy [in 1885].
I have not seen ordinary stars in an external galaxy before or since.