Messier 61 is a type of galaxy known as a starburst galaxy. Starburst galaxies have an abnormally high rate of star formation, hungrily using up their reservoir of gas in a very short period of time (in astronomical terms). However, that’s not the only activity we believe is going on within M61; deep at its heart there is thought to be a supermassive black hole that is violently spewing out radiation.
Despite its inclusion in the Messier Catalogue, Messier 61 was actually discovered by Italian astronomer Barnabus Oriani in 1779. Charles Messier also noticed this galaxy on the very same day as Oriani, but mistook it for a comet.
Image Credit: NASA