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Three intersecting circles each with three steps and with different distances between the centers. All that with a doctrinaire puzzle.
Shaula - "?" (Lambda) Scorpii, the second-brightest star system in the constellation of Scorpius, and one of the brightest stars in the night sky.
It bore the traditional name Shaula, which comes from the Arabic al-�awl?� meaning 'the raised [tail]', as it is found in the tail of Scorpius, the scorpion.
Lambda Scorpii is located some 570 light-years away from the Sun.
Spectroscopic and interferometric observations have shown that it is actually a triple star system consisting of two B-type stars and a pre-main-sequence star. The primary star is a Beta Cephei variable star with rapid brightness changes of about a hundredth of a magnitude. The pre-main-sequence star has an orbital period of 6 days and the B companion has a period of 1053 days. The three stars lie in the same orbital plane, strongly suggesting that they were formed at the same time. The masses of the primary, pre-main-sequence star and the B companion are 14.5, 2.0 and 10.6 solar masses, respectively. The age of the system is estimated to be in the range 10�13 million years.
Shaula appears on the flag of Brazil, symbolizing the state of Rio Grande do Norte.
The puzzle consists of three circles that intersect at different distances for every pair of axes. The puzzle is still doctrinaire.
Size: 122 x 130 mm
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Shaula
