Astronomy Picture of the Day . Field of Rosette . ... Credit: Rogelio Bernal Andreo (Deep Sky Colors) Explanation: What surrounds the florid Rosette nebula? ... Designated NGC 2237, the center of the Rosette nebula is populated by the bright blue stars of open cluster NGC 2244 , whose winds and energetic light are evacuating the nebula's center. ... To the right of S Mon is a dark pointy featured called the Cone nebula , a nebula likely shaped by winds flowing out a massive star obscured by dust. ...