Astronomers trapped Betelgeuse just before it began to darken, and they may have seen a wave of pressure rippling through its atmosphere.
A couple of years ago, Betelgeuse generated a lot of interest when it started to get dark. This caught the attention of astronomers around the world, who tried to understand what was going on. Was it about to become a supernova? Evidence showed that the dust was the most likely culprit in the red supergiant’s …