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
Word origin
Latin: swan; see cygnet
Cygnus in American English
(ˈsɪgnəs)
noun
1. Greek Mythology
a king of the Ligurians who is changed into a swan
2.
a N constellation in the Milky Way near Lyra, containing the bright star Deneb; the Northern Cross; the Cross; the Swan