Tuesday, June 01, 2004
Deepsky Top-100 (12): M 13, the Great Globular Cluster in Hercules
Edmond Halley discovered M 13 in 1714. It is one of the finest globular clusters of the northern celestial hemisphere you can observe from your own backyard. M13 has a visual diameter of 14’ and a visual magnitude of 5.7. The cluster lies at a ..... follow this link to read the full story.