NGC 4038 and NGC 4039 also called "Antennae Galaxies" are a pair of interacting galaxies located about 45 million light-years away and visible in the direction of the constellation Corv...
NGC 6946, a.k.a the Fireworks Galaxy, a face-on intermediate spiral galaxy of class SAB(rs)cd ~25 million light-years away on the boundary of Cepheus and Cygnus. Ten supernovae have be...