Are you wondering what it is in this image? It is “a spiral arm of the Whirlpool Galaxy grazes the light of a smaller companion galaxy that’s slowly being torn apart by its neighbor’s gravity.”
This photo won Australia’s Martin Pugh top prize in the 2012 Astronomy Photographer of the Year competition run by the U.K.’s Royal Observatory Greenwich. Also wonder what the blue, pink, and reddish things are in the big arm? Read more at here.