four yellow-orange circles of differing brightnesses

Betelgeuse’s Mysterious ‘Great Dimming’ May Have Been Triggered By A Wandering Black Hole

At the end of 2019, the star Betelgeuse faded by about 60%. While it’s impossible to say for sure exactly what caused it, new research suggests a fellow traveler may have played a role. While swinging near the giant star, the intruder may have lifted a tidal bulge, causing Betelgeuse’s surface to darken. While this …

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