The Whirlpool Galaxy M51 is located at a distance of approximately 31 million light-years from the Milky Way Galaxy in the constellation Canes Venatici. This spiral galaxy was discovered in 1774 by Charles Messier, and is designated as M51.
It is natural formed into Yin Yang shape in the center of galaxy.
The spiral center is very close to Lai's style of Yin Yang Tai Chi Symbol.
This photo is from Hubble telescope.