An Etymological Dictionary of Astronomy and Astrophysics

A → WN Wolf-Rayet star whose spectrum shows the following emission line characteristics: N III 4634-4641, 5314 Å as strong as N II 3995 Å, Balmer lines, He I with → P Cygni profile.

See also: W, from → Wolf-Rayet; N, from → nitrogen; → star.