Technical details: Location / Date: Outside of Ramnäs, Västmanland, Sweden / 2014-December Optics: Skywatcher Explorer 190MN + Sigma 1.4x tele converter Mount: 10 Micron GM1000 HPS (Unguided) Camera: Canon EOS 100D (Modded with Baader ACF filter) Exposure: 33 x 480 seconds all shot on ISO 3200 (cumulative exposure time is 4 hours and 24 minutes) Processing: Pixinsight and Photoshop   Image details: NGC 6946, (also known as the Fireworks Galaxy, Arp 29, and Caldwell 12), is an intermediate spiral galaxy about 22.5 million light-years away from Earth, in the constellations Cepheus and Cygnus. It was discovered by William Herschel on September 9, 1798. NGC 6946 is highly obscured by interstellar matter of the Milky Way galaxy, as it is quite close to the galactic plane. Nine supernovae (SN 1917A, SN 1939C, SN 1948B, SN 1968D, SN 1969P, SN 1980K, SN 2002hh, SN 2004et, and SN 2008S) in the last 60 years or so, have been observed in NGC 6946. (Information from Wikipedia)