... of the excellent southern sky to go after Dark and Reflectionnebula's in Orion ... The planetary and reflectionnebula's in Cygnus and Cassiopeia are awsome. ... Only a few reflectionnebula left to observe. ...
... What you see is the hot hydrogen gas which is excited to illumination by the hottest of the stars which have just formed within the nebula itself? and some of the light is reflection on dust from its brightest stars. ...