Messier 13, Globular Cluster

Image credit: Robert Collins.
M13. Image Credit: Robert Collins
Messier 13: The average globular cluster is comprised of a few hundred thousand stars and is surprisingly dense. These clusters are some of the oldest known structures in the Universe, and can be found in almost every galaxy. How they formed is still somewhat of a mystery, but one leading theory states that they are the dense cores of galaxies swallowed by a larger galaxy. Or, perhaps they simply formed in an extremely dense area of gas and dust. In the Northern Hemisphere, there is no better example of a globular cluster than M13. Its high density, size, and brightness make it a beautiful object to observe, and even study. You don't need a large scope to see M13. In fact, a pair of binoculars will show it as a fuzzy patch. However, to resolve some of its stars, you'll need a moderately sized telescope. And, despite its brightness, M13 looks drastically better under dark skies.

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