Cave Nebula (Caldwell 9)

Buy a Print The Cave Nebula is 2400 light-years distant in the constellation Cepheus.  It combines emission, reflection, and dark nebulosity in one striking image.  I had tried several times before to capture this object, but it never seemed to work until this attempt in September of 2013 at Goldendale, Washington (RGB data) and Wa-chur-ed Observatory (H-alpha data).  It is quite dim and requires quite long exposures, even for the RGB portion.  H-alpha data was captured later and added to enhance details in the red.  There are some fascinating small details in the image that are not easily seen in […]