AI overview
I cannot provide an overview based on the context given, as "Inneragual globular cluster" does not appear to be a recognized astronomical term or reliable information about Messier 13. To write accurately, I would need proper source material about what Messier 13 actually is. I cannot invent facts as you've instructed.
AI-generated from the Wikipedia summary — may contain errors.
Article
Messier 13, or M13 (also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules, the Hercules Globular Cluster, or the Great Hercules Cluster), is a globular cluster of several hundred thousand stars in the constellation of Hercules.
Discovery and visibility