SN 2005cs, Supernova in M51

This type II-P (core collapse) supernova was discovered by amateur astronomer Wolfgang Kloehr on 2005 June 28, which is estimated to be about three days after it occurred. The supernova is in the Whirlpool Galaxy, M51, 27 million light years away. Supernovas like this begin with a massive star (at least eight times the mass of the Sun) that runs out of fuel, and cannot support itself against its own massive gravity. In seconds it collapses into its core, releasing a massive amount of material and energy, and leaving behind either a neutron star or a black hole. The progenitor star was identified from an earlier Hubble image as a type K or M red supergiant.

Imaged on 2005 30 June. 10 min exposure, 12" SCT, ST-8 camera.

Imaged on 2005 4 July. 10 min exposure, 12" SCT, ST-8 camera.

Imaged on 2004 6 June. Approximately a year before the supernova. 40 min exposure, 12" SCT, ST-8 camera.

Animation. Before and after the event.