It Took a Century, but Astronomers Imaged Betelgeuse's Companion

Universe Today Universe Today

Betelgeuse is the red supergiant star in the shoulder of Orion.</p><p>For decades, astronomers have suspected that Betelgeuse has a companion star orbiting around it.</p><p>The image in the middle inset in this image was taken in January 2019 with the SPHERE instrument at ESO’s VLT, and shows Betelgeuse itself.</p><p>The image in the inset on the left was taken in December 2024, when the companion was predicted to be furthest apart from Betelgeuse as seen from Earth.</p><p>In this inset, Betelgeuse has been removed, revealing a source (marked with a crosshair) consistent with being Betelgeuse B. Credit: ESO/M. Montargès et al.</p><p>Background: N. Rissinger (skysurvey.org)https://www.universetoday.com/article_images/eso2611a_20260731_020600.jpg" width="1280" />

Most of us are familiar with Betelgeuse (also known as alpha Orionis), the bright shoulder star in the constellation Orion.

It's a red supergiant star that lies somewhere between 400 and 550 light-years away from us and is quite bright.

Betelgeuse contains about 14 times the mass of the Sun and is a fairly young star compared to ours.

It appears to be no more than 10 million years old, which means that it evolved rapidly from a protostar to the red giant we see today.

That lifecycle means Betelgeuse will explode as a supernova sometime in the relatively near future — say within the next 100,000 years.

Read full article at Universe Today →