Betelgeuse is one of the brightest and closest stars in our night sky. 🌟 But last fall, astronomers noticed the star dimming dramatically. Ultraviolet observations from Hubble suggest that the unexpected dimming was probably caused by a large amount of superhot material ejected into space. The material cooled and formed a dust cloud that blocked the starlight coming from about a quarter of Betelgeuse's surface! Learn more: https://go.nasa.gov/3amX22k Illustration credit: NASA, ESA, and E. Wheat