Betelgeuse: The Impending Supernova That Will Light Up the Sky.

Betelgeuse, a red supergiant star, is nearing the end of its lifetime and could go supernova within the next 1,000 years. While it won't pose a direct danger to Earth, it will burn very intensely in the sky for weeks, about as bright as the full Moon and easily visible during the day. This brightness will be concentrated in a point source, making it potentially dangerous to observe through a telescope at its peak brightness. However, it probably won't be as bright as the Geminga supernova that occurred about 300,000 years ago, which was just 550 lightyears away.