Red supergiant star Betelgeuse will temporarily blink out on December 11 as asteroid 319 Leona passes in front of it. Astronomers will use the 12-second occultation to map the star's surface and investigate its recent odd behavior. The event will be visible from a narrow path across Asia, southern Europe, Florida, and eastern Mexico, with a livestream available.

https://www.livescience.com/space/astronomy/one-of-the-brightest-stars-in-the-sky-will-blink-out-on-dec-12-heres-how-to-watch