This is the Leo Triplet; three galaxies about 35 million light years away.
To the left is NGC 3628 and to the right M66 and below is M65.
They are gravitationally interacting and M66 features a somewhat deformed spiral arm as a result of once being close to NGC 3628.
This is a 6 hour total exposure over three nights. 5 minute subs. Location central Lyon, France
Orion 8"RC at f8/1600mm
SW ED80 and Lodestar guiding
Nebulosity 2.5 Capture
PHD Guiding - dithered
AstroArt Preprocessing and Stacking
PixInsight Stretch and DBE and SCNR
PS CS5 Edit