How Betelgeuse blew its top and lost its rhythm – Physics World - physicsworld.com

Huge convective cell may have created cloud that caused "Great Dimming" of star

Obscured by a cloud: the bottom panel shows a time series of the expected ~400-day pulsation in the brightness of Betelgeuse (blue dashes) as well as the measured brightness (orange line). The top pa… [+5774 chars]

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