Yet blue supergiants, some of the most massive stars, are lonely. The reason for this may be that blue supergiant stars exist in systems in which the occupants have already spiraled together, ...

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) ...

Blue supergiants may be formed by two stars in a binary system merging. NASA artistic image of a binary system of a red giant star and a younger companion. Casey Reed, NASA ...

Rare blue supergiant stars are some of the hottest, brightest stars in the universe. But other distant supernovas have shown that before they exploded, stars ejected dense clouds decades beforehand.

The supernova is the remnants of a blue supergiant star called Sanduleak–69 202. It was believed to hold a mass about 20 times that of the sun before the explosion was detected in February 1987.

Rare blue supergiant stars are some of the hottest, brightest stars in the universe. But other distant supernovas have shown that before they exploded, stars ejected dense clouds decades beforehand.

Rare blue supergiant stars are some of the hottest, brightest stars in the universe. But other distant supernovas have shown that before they exploded, stars ejected dense clouds decades beforehand.