noun
quasi-stellar object; QSO; quasar
Rare astronomical term for a quasar or quasi-stellar object. In modern Japanese, クエーサー is far more common.
See also: クエーサー
A quasi-stellar object is a type of distant active galactic nucleus.
この天体は恒星状天体に分類される。
This celestial body is classified as a quasi-stellar object.