M13- The great globular cluster in Hercules (MARK Shelton)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Hercules Globular Cluster · M 13 · NGC 6205

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M13- The great globular cluster in Hercules

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M13- The great globular cluster in Hercules

About 145 light-years in diameter, M13 is composed of several hundred thousand stars, the brightest of which is a red giant, the variable star V11, also known as V1554 Herculis,[12] with an apparent visual magnitude of 11.95. M13 is 22,200–25,000 light-years away from Earth.[13]

Single stars in this globular cluster were first resolved in 1779.[13] Compared to the stars in the neighborhood of the Sun, the stars of the M13 population are more than a hundred times denser.[13] They are so densely packed together that they sometimes collide and produce new stars.[13] The newly formed, young stars, so-called "blue stragglers," are particularly interesting to astronomers.[13]

The 1974 Arecibo message, which contained encoded information about the human race, DNA, atomic numbers, Earth's position and other information, was beamed from the Arecibo Observatory radio telescope towards M13 as an experiment in contacting potential extraterrestrial civilizations in the cluster. The cluster will move through space during the transit time; opinions differ as to whether or not the cluster will be in a position to receive the message by the time it arrives.[14][15]

Details provided by Wikipedia- all rights acknowledged

Clusters
Globular Clusters

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Status	Advanced success
Started	...
Astrometry.net job	4345724
PixInsight job	54KEEEN10M3WSMIFDXPR3NW5ZUC04VCV
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	16h41m43s.242
RA (top/left)	16h42m40s.327
RA (top/right)	16h40m16s.178
RA (bottom/right)	16h40m46s.490
RA (bottom/left)	16h43m09s.870

Dec (center)	+36°27′11″.14
Dec (top/left)	+36°41′11″.62
Dec (top/right)	+36°31′53″.50
Dec (bottom/right)	+36°13′12″.45
Dec (bottom/left)	+36°22′26″.25

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M13- The great globular cluster in Hercules

M13- The great globular cluster in Hercules

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M13- The great globular cluster in Hercules

M13- The great globular cluster in Hercules

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