The Christmas Tree Cluster, Fox Fur Nebula and Cone Nebula in Monoceros (NGC 2264) the complex jumble of cosmic gas and dust is about 2,700 light-years distant and mixes reddish emission nebulae excited by energetic light from new-born stars with dust clouds. Where the otherwise obscuring dust clouds lie close to the hot, young stars they also reflect starlight, forming blue reflection nebulae.
Inside the Carina Nebula: Cropped from original 465 mb tif image. A towering “mountain” of cold hydrogen gas laced with dust is the site of new star formation in the Carina Nebula (NGC 3372). The great gas pillar is being eroded by the ultraviolet radiati