The California Nebula is seen in its entirety in this image from NASA’s WISE mission, covering over 25 square degrees of sky. In this infrared view, the dust clouds underlying the nebula glimmer ...
Inside the bright but unassumingly named nebula Gum 55 lies a dark nebula - a rift of dust grains that absorb visible light - creating a swatch of darkness against the glow of bright gas.