#RosetteNebula - The Rosette Nebula (also known as Caldwell 49) is a large, circular H II region located near one end of a giant molecular cloud in theMonoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, thestars of the cluster having been formed from the nebula's matter. Distance: 5,200 ly