Tags: Galaxy.
NGC 2207 and IC 2163 are a pair of colliding spiral galaxies about 80 million light-years away in the constellation Canis Major. Both galaxies were discovered by John Herschel in 1835. So far four supernovae have been observed in NGC 2207 (type Ia SN 1975a in January 1975 type Ib SN 1999ec in October 1999 type Ib SN 2003H—discovered halfway between the two galaxies. and type II supernova SN 2013ai in March 2013. NGC 2207 is in the process of tidally stripping IC 2163.
