You’ve probably heard that the famous star Betelgeuse has gotten weirdly dim. In past autumn it faded and faded until it was no longer an eye-catching object in its constellation of Orion. Nobody quite knew what was going on or how long the dimming would last. Nobody had seen it this faint since 1941. Added to the fact that Betelgeuse is the type of supergiant that will eventually explode into a supernova, well, that made many folks nervous.