Nebulas amid star clusters in Monoceros, the Unicorn. The main nebula at bottom is the Rosette nebula (NGC 2237-9/45), surrounding the star cluster NGC 2244. In this long exposure streams of nebulas extend north to connect to a large region of diffuse nebulosity around the Christmas Tree cluster (NGC 2264), with the main nebula at top catalogued as Sharpless 2-273 and containing a region of bright blue reflection nebulosity. Just below that blue nebula is the dark, conical Cone nebula. Just below it is Hubble's Variable nebula, NGC 2261, a small bright triangular patch. The blue reflection nebula at upper right is IC 2169, surrounded by other smaller patches of reflection nebulosity including NGC 2245 and IC 446. The V-shaped dark nebula at top is LDN 1603. The star cluster just below that is Trumpler 5.