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Two intersecting circles but with two concentric circles of pieces per half.
Rigel (/?ra?d??l, -??l/), also designated Beta Orionis (? Orionis, abbreviated Beta Ori, ? Ori), is generally the seventh-brightest star in the night sky and the brightest star in the constellation of Orion.
The star as seen from Earth is actually a multiple star system of three to five stars, the primary star (Rigel A) being a blue-white supergiant which is estimated to be anywhere from 120,000 to 279,000 times as luminous as the Sun. A companion, Rigel B, is 500 times fainter than the supergiant Rigel A and visible only with a telescope. Rigel B is itself a spectroscopic binary system, consisting of two main sequence blue-white stars of spectral type B9V that are estimated to be respectively 3.9 and 2.9 times as massive as the Sun; Rigel Bb may itself be a binary.
The puzzle, named "Rigel" is the first intersecting circles puzzle constructed according to the scheme "circle inside the circle" as demonstrated by the two turns in the images 2 and 3.
Even more amazing: The rings are of different order: The inner circle has 3-fold symmetry and the outer sixfold.
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