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Why does Betelgeuse keep fading? The mystery of Orion's giant star

Why does Betelgeuse keep fading? The mystery of Orion's giant star
Image: Space.com

Astronomers are piecing together why Orion's red supergiant Betelgeuse keeps changing its brightness. Stellar pulsations, giant dust clouds, and a mysterious companion star are among the leading explanations.

Fluctuations in Orion's Red Supergiant

Astronomers are conducting extensive research to unravel the ongoing brightness variations of Betelgeuse, a prominent red supergiant star located in the constellation of Orion. The star's periodic dimming and light fluctuations continue to intrigue the astrophysical community.

Pulsations, Dust Clouds, and a Companion Theory

Detailed observational data suggest that multiple factors may be driving the light changes of Betelgeuse. Enormous internal stellar pulsations, massive dust clouds formed by mass ejected from the star, and gravitational interactions from a potential mysterious companion star are all primary explanations being evaluated.

Impacts on Stellar Evolution and Supernova Models

Studying red supergiants in the late stages of their lives is crucial for understanding massive star evolution and mass ejection into the interstellar medium. Resolving the mechanisms behind Betelgeuse's variable behavior will help refine theoretical models predicting eventual supernova events.

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