Astronomers Confirm Betelgeuse's Hidden Companion Star

TL;DR Summary
Astronomers using the Gemini North telescope's 'Alopeke instrument have directly detected a close-in blue-white companion star orbiting Betelgeuse, explaining its six-year brightness variability and providing new insights into the life and future death of this red supergiant star.
- Hidden neighbor: Astronomers confirm long-suspected companion star near Betelgeuse Phys.org
- Astronomers crack 1,000-year-old Betelgeuse mystery with 1st-ever sighting of secret companion (photo, video) Space
- Betelgeuse’s companion star revealed in new images Science News
- It's Official: Betelgeuse Has a Binary 'Twin', And It's Already Doomed ScienceAlert
- Mystery of star’s twinkle solved after hundreds of years The Telegraph
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