The Swan Nebula (M17) in Hydrogen-alpha (16 x 5 minute exposures with the WilliamOptics ZS61 and Atik414EX mono CCD camera). Reprocessing a set of frames I shot almost a year ago. You can really see the swan in this shot. Messier 17 is also called the Omega Nebula, but I see a swan, and I don't see an Ω. Not really, maybe that loop at the top, the swan's arched neck?