October 22, 2021

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Mysterious dimming of bright star Betelgeuse may be from ‘sunspots’ and temperature changes

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The mysterious strange dimming seen last year in the huge star Betelgeuse may be from giant sunspots and temperature fluctuations.

A new study suggests a “large dark spot” led to Betelgeuse’s surface temperature dropping, which in turn contributed to a temporary dimming in the red giant’s luminosity or inherent brightness.



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