The Hercules Cluster (M13)

Posted by Fred Herrmann
on Friday, July 04, 2014

I’ve imaged a bunch of these globular clusters and they always fascinate me. Especially since they manage not to implode into one giant black hole. I’ve read up on these and as of yet I haven’t found out what keeps them from imploding. M13, aka “The Great Cluster in Hercules” is the largest globular cluster visible from the northern hemisphere. As the name implies it resides in the constellation Hercules at a distance of 22,000 light-years.

In this image you can also see the tiny galaxy IC4617 about half way to the edge at the 5 o’clock position. IC4617 is a staggering ~500 million light-years from us and at magnitude 14.5 is 40 million times dimmer than the planet Venus! At the right bottom corner you can also see the larger galaxy NGC6207 which is just around the corner at ~40 million light-years.

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