Betelgeuse dimmed dramatically, prompting theories of an impending supernova. Instead, astronomers uncovered an even stranger ...

Betelgeuse dimmed unexpectedly, sparking theories it was about to go supernova. Though it recovered, scientists confirmed ...

Nearby supernova blasts may have severely altered Earth’s climate history Tree rings reveal spikes in carbon-14 from ancient ...

Ancient supernovas may have blasted Earth with powerful radiation, causing dramatic changes in our climate, and could do so ...

Betelgeuse, a red giant about 500 light-years away, is nearing the end of its life and will eventually explode as a supernova. This event will be spectacular, visible even during the day, and ...

The bright, naked-eye star Betelgeuse is well known for its variations — some of which may be caused by an unseen companion star. ... and set to go supernova at any moment.

Betelgeuse has brightened and dimmed over the years, ... The timing of the star's inevitable supernova is up for scientific debate, and NASA suggests it won't happen for some 100,000 years.

The supergiant star Betelgeuse may have a companion star that pushes light-blocking dust out of the way, causing the irregular changes observed in the star's brightness.

Betelgeuse, one of the brightest stars in the sky, may have a secret sunlike companion that drives the star’s mysterious six-year-long "heartbeat," new research suggests.

Betelgeuse May Not Be On The Edge Of Supernova. It Might Just Have A Buddy Betelgeuse has been dimming strangely, leading some to think it's on the edge of going supernova.

OK, now let's apply this to a Betelgeuse supernova. We can start with a luminosity of 2 x 10 38 watts, like that supernova in 2015. For the distance, I'm going to use 500 light-years.