"The star, called Rho Cassiopeia, is a hypergiant with 20 to 40 times the mass of the sun. "

"Eventually, perhaps in a few thousand years, Dupree said Rho Cas will erupt into a supernova explosion, one of the most powerful releases of energy in the universe. That will rip the star apart in one final, gigantic spasm of violence."

In a few thousand years, or perhaps tomorrow?