NGC2237-1

This stunning emission-line image of the Rosette nebula (NGC2237) in
the constellation Monoceros (the Unicorn) was taken at the National
Science Foundation's 0.9-m telescope on Kitt Peak with the Mosaic
camera, and is presented here in false color (hydrogen alpha, OIII
oxygen, and SII sulfur respectively red, green and blue, using five
ten-minute exposures each). The Rosette is a prominent star formation
region, glowing due to ultraviolet light from the young, hot, blue
stars whose winds also cleared the central hole. It is enormously
large on the sky, covering more than six times the area of the full
moon.

Minimum credit line: T.A.Rector, B.Wolpa, M.Hanna, AURA/NOAO/NSF (for
details see Copyright Statement)