noun
active galaxy
Astronomical term for a galaxy with an unusually luminous core, often due to an accreting supermassive black hole.
活動銀河の中心には超大質量ブラックホールがあると考えられている。
It is thought that there is a supermassive black hole at the center of an active galaxy.
クエーサーは非常に遠方にある活動銀河の一種です。
Quasars are a type of active galaxy located at very great distances.