Betelgeuse, 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 that make up the Winter Triangle, and it marks the center of the Winter Hexagon.
All stories in Betelgeuse
Astronomers have observed the ever dimming surface of Betelguese with the aid of the ESO’s Very Large Telescope (VLT). ...