Betelgeuse's 'Great Dimming' Likely Triggered by Dark Star-Spot That Made Temperatures Plummet
Sitting in the constellation of Orion, the 10th brightest star in the sky Betelgeuse is a supergiant, likely to explode at the end of its life cycle in 100,000 years. However, it displayed an unexpected dimming, and by April 2020 dropped to 40 percent of its usual luminosity, triggering speculation it might go supernova.