noun
Seyfert galaxy
A type of galaxy with an active galactic nucleus, characterized by bright, compact cores and strong emission lines. Used in astronomy.
セイファート銀河は活動銀河核を持つ銀河の一種です。
A Seyfert galaxy is a type of galaxy with an active galactic nucleus.
Named after American astronomer Carl Seyfert, who first described this class of galaxies in 1943.