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Two intersecting circles with 147 pieces, named after the brightest binary star system on the sky.

Sirius (/?s?ri?s/, a romanization of Greek ???????, Seirios, lit. "glowing" or "scorching") is a star system and the brightest star in the Earth's night sky. With a visual apparent magnitude of ?1.46, it is almost twice as bright as Canopus, the next brightest star. The system has the Bayer designation Alpha Canis Majoris (? CMa). What the naked eye perceives as a single star is a binary star system, consisting of a white main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, called Sirius B. The distance separating Sirius A from its companion varies between 8.2 and 31.5 AU.
The inventor seemed it fitting to name his difficult puzzle after the brightest star system.
The puzzle consists of 147 pieces.

Three years later "El cubitero" presented his own version, shown in image 5.



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