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Sky This Month
Picture of the Day
The colors of the Cave
Steve Leonard, taken from Markham, Ontario
The Cave Nebula (Sharpless 2–155) is an object that features emission, reflection, and dark nebulae. This Hα/OIII/SII image with exposures of 10, 13, and 6 hours, respectively, taken with a 4.5-inch refractor, was processed as a blend of a static Hubble-palette rendition and a dynamic Foraxx-palette combination of channels.