Tunisian Association of Young Astronomers

M51: is a couple of galaxies, located about 27.4 million LY of the Earth,in the Hunting Dogs constellation, consisting of a massive regular spiral galaxy (NGC 5194) with an estimated diameter of 100,000 light years and a small irregular galaxy (NGC 5195). It was discovered in 1773 by Charles Messier.
Magnitude apparente : 8,4.
Mariazell, Austria