infrared galaxy

noun

, Astronomy.

1. a galaxy that radiates strongly in the infrared portion of the electromagnetic spectrum.

Word History and Origins

Origin of infrared galaxy¹

First recorded in 1965–70

Example Sentences

A prime example of this phenomenon is the nearest ultraluminous infrared galaxy, Arp 220, which is located 250 million light-years away.

From Scientific American

After a ponderous chapter on infrared galaxy counts come quasars and active galactic nuclei, galactic clusters, the history of star-formation and, finally, Spitzer’s role in estimating the redshifts of the most distant galaxies, a remarkable achievement for a telescope of its size.

From Nature