释义 |
DictionarySeeringBarnard's loop
Barnard's loop or ring (bar -nardz) see Orion.Barnard's loop[′bär·nərdz ‚lüp] (astronomy) A large emission nebula, about 10° by 140° in size, around the central portion of Orion, that consists of an expanding shell of gas that probably originated in a supernova. |