| M13 (NGC6205) / Globular Cluster, type V |
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| R.A. | 16h 41m 42.0s (2000.0) |
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| Dec. | +36° 28' 00" (2000.0) |
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| Apparent Size | 10' |
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| Real Size | 98 light yrs. |
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| Magnitude | 5.7 |
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| Distance | 22,000 light yrs. |
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M13 (NGC6205) is a spectacular globular cluster known as "The Hercules Cluster".
It's universally acclaimed as the best globular in the Northern Hemisphere,
lies on a line between eta Herculis and zeta Herculis. The cluster has a size of about 10 arc minutes and about over 100 thousand fine stars,
22 thousand light years away.
Usual nebulae and star clusters in our Galaxy are distributed in the disk being spiral structure.
However, almost all of globular clusters, including M13, don't obey this rule,
they equally distribute in the gigantic sphere region called "Halo" that encloses whole the Galaxy.
Stars included in the globular clusters are very old normally over 10 billion years, about equal with the Galaxy itself.
So the globular cluster should be one of the most important objects to research for origin of formation of the Galaxy.
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