WOH G64, a red supergiant star

Astronomy & Observing News

Astronomers Witness Transformation of One of the Largest Stars

One of the largest known stars — a red supergiant — suddenly shrank and heated up, transforming into a different kind of star.

A star goes poof!

Observing

Seeking Cas A, the Ghostly Remains of a Mysterious Supernova

We still don't know for sure if anyone saw the supernova explosion in Cassiopeia around 1680, but there's no question we can observe what remains of it today.