M51 (NGC 5194, NGC 5195)
Whirlpool Galaxy
M51 was the first spiral galaxy which was identified as such in 1845 by William Parsons. Along with its companion galaxy NGC5195 it is observable with smaller telescopes as well and a popular "first light" for telescopes with a larger focal length.
The next image shows the full frame in a manual edit (580mm, ASI2600MM, LRGB 1h).