Is Betelgeuse Going Supernova In 2024. They claim that betelgeuse is currently undergoing carbon burning, suggesting it could explode as a supernova in less than a century from now. This fiery demise is what astronomers call a supernova explosion, and in the case of betelgeuse, it will be a spectacular sight for observers on earth.

Was the dimming a signal that the explosion was imminent? Just how bright are we talking?