Betelgeuse

Betelgeuse , also known by its Bayer designation Alpha Orionis is the ninth-brightest star in the night sky and second-brightest in the constellation of Orion. Distinctly reddish, it is a semiregular variable star whose apparent magnitude varies between 0.2 and 1.2, the widest range of any first-magnitude star. Betelgeuse is one of three stars that make up the Winter Triangle, and it marks the center of the Winter Hexagon. The star's name is derived from the Arabic Yad al-Jauzā', meaning "the hand of Orion". The Arabic character for Y was misread as B by medieval translators, creating the initial B in Betelgeuse.
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