Gallery ▴ A DIM "BRIGHT" NEBUL A Dan Crowson Lynds Bright Nebula (LBN) 270, between Deneb and Sadr in Cygnus and centered here, is actually quite dim. Framing it are brighter glows from LBN 273, 274, and 292. Details: Astro-Tech AT90EDT apochromatic refractor and SBIG ST-8300M CCD camera with LRGB filters. Total exposure: 4 hours. ▶ ELUSIVE GREEN FL ASH Eusebio Rufián A final glint of emerald green (caused by differential refraction in the atmosphere) is all that remains of the setting Sun as seen from Cadiz, Spain, on September 14, 2014. Details: Orion EON 110mm ED apochromatic refractor and Nikon D100 DSLR camera used at ISO 200. Exposure: ¼ 000 second. 76 October 2015 sky & telescope