M51 Whirlpool Galaxy
M51 is around 31 million light years from earth and around 76,000 light years across making it smaller than our Milky Way galaxy. Like many galaxies there is a black hole in the centre.
The smaller interacting galaxy is NGC5195 and it is thought this may have actually passed through the centre of M51 around 500 million years ago. M51 currently appears to be “sucking” matter out of NGC5195.
M51 is actively forming new stars whilst old ones are dying - three supernova (exploding stars) have been seen here by astronomers since 1994.
There are numerous small galaxies in the image and many of them can be seen on a good screen, the two main galaxies hold around 100 billion (100,000,000,000) stars.
Actual Size : 76,000 Light Years
Sky Size : 11.2' x 6.9'
Distance : 31 million Light Years