Betelgeuse

Betelgeuse (/ˈbiːtəldʒuːz/ or /ˈbɛtəldʒuːz/), also known by its Bayer designation Alpha Orionis (α Orionis, α Ori), is the eighth 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 which make up the Winter Triangle and marks the center of the Winter Hexagon. The star's name is thought to be derived from the Arabic يد الجوزاء Yad al-Jauzā' meaning "the Hand of al-Jauzā'", i.e. Orion, with mistransliteration into medieval Latin leading to the first character y being misread as a b.