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HERCULES

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Originally appearing in Volume V13, Page 347 of the 1911 Encyclopedia Britannica.
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HERCULES , in See also:

astronomy, a See also:constellation of the See also:northern hemisphere, mentioned by See also:Eudoxus (4th See also:century B.C.) and See also:Aratus (3rd century B.C.) and catalogued by See also:Ptolemy (29 stars) and Tycho See also:Brahe (28 stars). Represented by a See also:man kneeling, this constellation was first known as " the man on his knees," and was afterwards called Cetheus, See also:Theseus and Hercules by the See also:ancient Greeks. Interesting See also:objects in this constellation are: a Herculis, a See also:fine coloured See also:double See also:star, composed of an See also:orange star of magnitude 22, and a See also:blue star of magnitude 6; Herculis, a binary star, discovered by See also:Sir See also:William See also:Herschel in 1782; one component is a yellow star of the third magnitude, the other a bluish, which appears to vary from red to blue, of magnitude 6; g and u Herculis, irregularly variable stars; and the cluster M. 13 Herculis, the finest globular cluster in the northern hemisphere, containing at least 5000 stars and of the r000 determined only 2 are variable.

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HERCULES (0. Lat. Hercoles, Hercles)

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