Wikipedia Notes: NGC 6946, (also known as the Fireworks Galaxy and Arp 29), is an intermediate spiral galaxy about 22 million light-years away,[2] on the border between the constellations Cepheus andCygnus. 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) have been observed in NGC 6946.[3]