Ten supernovae have been observed in NGC 6946 in the last 100 years: SN 1917A, SN 1939C, SN 1948B, SN 1968D, SN 1969P, SN 1980K, SN 2002hh, SN 2004et, SN 2008S, and AT 2017eaw.[6][7] This makes it the most prolific known galaxy for this type of event over a period of 100 years. By comparison, the Milky Way galaxy, which has double the number of stars as NGC 6946, averages one supernova event per century.[8] It also contained the failed supernova potential blackhole forming star N6946-BH1.[9]

구글 검색하다가 알게된 위키피디아 내용입니다. 이 은하에 뭔일이 있는건가 최근에 초신성이 엄청 많이 생겼었네요. 보통 한 은하에 백년에 한번 초신성이 생길 확률이라는데 여기는 백년간 열번째 군요.