RUSSELL CROMAN / SCIENCE PHOTO LIBRARY RUSSELL CROMAN / SCIENCE PHOTO LIBRARY
Hercules globular cluster (M13), optical image. A globular cluster is a huge spherical grouping of old stars that orbits a galaxy, in this case our Milky Way. M13 is around 168 light years in diameter and lies 25,100 light years from Earth in the constellation Hercules.
Model release not required. Property release not required.