M01, the Crab Nebula
Exploded in 1054, Messier 1 or the Crab Nebula is still expanding.
The first photo is from the POSS1 Digitized Sky Survey somewhere in the 50’s, the second photo is taken with a 90/600mm apo by me in 2014.
Also a number of stars have moved during the 65 years.
Messier 1, 1950's - 2014
Click to zoom in.