Betelgeuse has a companion star, Siwarha. Astronomers confirm the dying red giant isn't alone. Here's what it means

Betelgeuse's companion star discovered explained its variable brightness. Astronomers have confirmed Betelgeuse, a famous night sky star, has a hidden companion. This small, hot star, named Siwarha, has been orbiting Betelgeuse for generations. Using advanced telescopes, scientists captured the sharpest image of Siwarha, confirming its existence. Siwarha's presence may influence Betelgeuse's eventual supernova explosion. Further observations are planned to solidify the findings in the coming years.

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