Astronomers and scientists love Betelgeuse because it shines so brightly. While most stars appear as tiny points of light, Betelgeuse is large enough, and close enough, that we can study it in much greater detail. But this red supergiant star is strange, often shifting, dimming and brightening in our night sky.
In July 2025, scientists found a companion star in Betelgeuse's outer atmosphere, which could account for the red supergiant star's odd appearance. Now, using new observations from the Hubble Space Telescope, as well as data from observatories here on Earth, scientists have detected the wake of Betelgeuse's companion star, which is named Siwarha. This new study confirms Siwarha's existence.
