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Castor
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One circle on the inside and five circles on the outside form a complex puzzle, derived from a theory-ladden concept.

Castor, also designated Alpha Geminorum (? Geminorum, abbreviated Alpha Gem, ? Gem) is the second-brightest star in the constellation of Gemini and one of the brightest stars in the night sky. It appears single to the naked eye, but when using a telescope it can be resolved into a multiple star system made up of six individual stars.
Castor and Pollux are the two "heavenly twin" stars that give the constellation Gemini (meaning twins in Latin) its name. The name Castor refers specifically to Castor, one of the twin sons of Zeus and Leda in Greek and Roman mythology.
The inventor got the idea for this puzzle in a posting of Oskar van Deventer in a theory-ladden discussion about nonjumbling puzzles although Dmitry made it more complex. An easier version is Oskar's Moonshine which has its own entry in the museum.

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