Messier 13 (M13) The Great Globular Cluster in Hercules

This is my first attempt at a deep sky object using my new Skywatcher 80ED DS Pro refractor attached to a Canon 40D. 15 x 30 second images @ iso 1600 were stacked in DSS.
M13 contains an amazing 300,000 stars and is 22.2 million light years away.
Discovered by Edmond Halley in 1714 it is an enormous 145 light years in diameter.
By the way, 1 light year is about 6 trillion miles.
A faint side on spiral galaxy, named NGC 6207 is far left of the image and is between 30 and 45 million light years away.