How many hexagon can you fin...How many hexagon can you find here?
Correct answers: 78
The first user who solved this task is Roxana zavari.
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Friedrich Wilhelm August ArgelanderDied 17 Feb 1875 at age 75 (born 22 Mar 1799).German astronomer who established the study of variable stars as an independent branch of astronomy and is renowned for his great catalog listing the positions and brightness of 324,188 stars of the northern hemisphere above the ninth magnitude. He studied at the University of Königsberg, Prussia, where he was a pupil and later the successor of Friedrich Wilhelm Bessel. In 1837, Argelander published the first major investigation of the Sun's motion through space. In 1844 he began studies of variable stars.