Supernova Factory NGC 2770 Credit: A. de Ugarte Postigo (ESO) et al., Dark Cosmology Centre (NBI, KU), Instituto de Astrofísica de Andalucía (CSIC), University of Hertfordshire Explanation: The stellar explosions known as supernovae are among the most powerful events in the universe. Triggered by the collapsing core of a massive star or the nuclear demise of a white dwarf, supernovae occur in average spiral galaxies only about once every century. But the remarkable spiral galaxy NGC 2770 has lately produced more than its fair share. Two still bright supernovae and the location of a third, originally spotted in 1999 but...