Celestial hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Great Cluster in Hercules  ·  Hercules globular cluster  ·  IC 4617  ·  M 13  ·  NGC 6205  ·  NGC 6207
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M13 - Hercules Globular Cluster Revisited, Kurt Zeppetello
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M13 - Hercules Globular Cluster Revisited

Getting plate-solving status, please wait...
M13 - Hercules Globular Cluster Revisited, Kurt Zeppetello
Powered byPixInsight

M13 - Hercules Globular Cluster Revisited

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Well I finally redid this object after three years. The old image was so 'good' I must have forgot to put it on Astrobin as a separate image but here is a link to it (https://kurtzeppetello.smugmug.com/Globular-Clusters/i-w5KSQBj). Like all globular clusters, M13 or the Hercules Globular Cluster (NGC 6205), does not reside in the galactic plane but rather outside surrounding the central bulge. M13 is considered to be the best in the northern hemisphere and is visible all year at latitudes greater than 36 degrees. With a diameter of 145 light-years and several hundred thousand stars it certainly does have boasting rights. Even at 22,000 light years away it is very impressive. The cluster, like most clusters, contains very old stars on the order of 12 to 13 billion years old, however, this cluster is of particular interest because it produces young blue stragglers - large blue giant stars formed as result of colliding old stars (source: wikipedia and Earthsky).

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