Rosette nebula in Monoceros
author: P.Mortfield/S.Cancelli/Novapix
reference: a-neb22-37016
Image Size 300 DPI: 18 * 12 cm
The Rosetta Nebula in the constellation Monoceros (the Unicorn) is a vast cloud of dust and gas, extending over an area of more than 1 degree across, or about 5 times the area covered by the full moon. Its parts have been assigned different NGC numbers: 2237, 2238, 2239, and 2246. Within the nebula, open star cluster NGC 2244 is situated, consisted of the young stars which recently formed from the nebula's material, and the brightest of which make the nebula shine by exciting its atoms to emit radiation. Emission-line image presented here in false color.