I am sure you all have recognized this, its the Great Cluster in the Constellation Hercules. Its photographed by Mr. Saad Abbasi, an enthusiast Astro Photographer from Pakistan.
A 48 minute exposure generated this image.
A full resolution version of this image can be found here
M13 or Messier 13 is a globular cluster in the Constellation Hercules (Hero). Globular clusters are large collection of stars in which gravity binds all the stars to form a circular shape (contrary to Open Cluster in which stars are loosely bound). M13 was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764 in his famous Messier Catalogue.
M13 lies at a distance of 25.1 kly (Kilo Light Years) away from the Earth. Its total mass is about 1036 KG and its estimated age is nearly 1.4 × 1010 years.