Four Supernovae in Four Messier Galaxies: SN 2014J (M82), SN 2014L (M99), SN 2014bc (M106) and 2014dt (M61)
The recent supernova in Messier 61 is the latest member of a very special and very small group, the one including all the supernova events happened in 2014 in a Messier galaxy. So far,...
