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Newshour - Dim and bright: The mystery of supergiant star Betelgeuse - 蜜芽传媒 Sounds

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Dim and bright: The mystery of supergiant star BetelgeuseDim and bright: The mystery of supergiant star Betelgeuse

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Astronomers have wondered for years why the star regularly dims and brightens again.

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Dim and bright: The mystery of supergiant star Betelgeuse
Astronomers have wondered for years why the star regularly dims and brightens again.
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