The Rosette Nebula is an active stellar nursery. At its center is a cluster of young star, occupying a open area thought to be caused by solar winds generated by igintion of new stars. About 50 light-years across and 5,000 light-years from Earth, the Rosette Nebula is located in the constellation Monoceros. This is one of may favorite nebulas, a wonderful visitor every winter in the dark sky over Big Sur to the south of my observatory.
 
17.1 hours total exposure of ionized hydrogen, oxygen, and sulfur emissions