M51 (NGC 5194) - Whirlpool Galaxy
Messier 51 (NGC 5194), also known as the Whirlpool Galaxy, is a spiral galaxy located in the constellation Canes Venatici in the M51 Group of galaxies. M51 is 31,000,000 light years away from Earth.
M51 is best viewed during early spring, is magnitude 8.4, and can be viewed with binoculars. M51 is 11' x 7' in apparent size. For reference, the full moon is 30' (arc minutes) in size.
* The naked eye can see up to magnitude 8 objects under ideal dark sky conditions.