|—n , Latin genitive Cygni|
|a constellation in the N hemisphere lying between Pegasus and Draco in the Milky Way. The constellation contains the Cygnus Loop supernova remnant, the intense radio galaxy Cygnus A, and the intense galactic X-ray source Cygnus X--1, which is probably a black hole|
|[Latin: swan; see |
|Cygnus (sĭg'nəs) Pronunciation Key
A constellation in the Northern Hemisphere near Cepheus and Lyra. Cygnus (the Swan, or the Northern Cross) contains the bright star Deneb.