Rigel is a blue supergiant that is the brightest star in the constellation Orion (the Hunter). Due to its measured size and brightness it is expected to end in a supernova one day. It also has two ...

Blue supergiants are supergiant stars (class I) of spectral type O. They are extremely hot and bright, with surface temperatures of between 20,000 - 50,000 degrees Celsius. The best known example ...

The blue supergiant called Rigel, around 870 light-years from the sun, is one of the brightest stars in the sky. (Image credit: NASA/STScI Digitized Sky Survey/Noel Carboni) ...

Everybody's always worried about Betelgeuse in Orion blowing up as a supernova. There's a good chance that may happen one day, but no need to panic. The star's too far away to trouble earthlings ...

The Sun is a G2V star and Rigel is a B8Iab. How do astronomers get the classifications this precise? Nick Smith, Minot, North Dakota ...