RED ON ARRIVAL This sharp cosmic portrait features glowing gas and obscuring dust clouds in IC 1795, a star forming region in the northern constellation Cassiopeia. Also cataloged as NGC 896, the nebula’s remarkable details, shown in its dominant red color — caused by hydrogen atoms ionized by UV light cast off by young stars — were captured using a sensitive camera, and long exposures that include image data from a narrowband filter. (Photo via NASA APOD)