https://www.universetoday.com/158116/astronomers-think-they-have-a-warning-sign-for-when-massive-stars-are-about-to-explode-as-supernovae/
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10/15/22 at 5:02pm
Organization
Universe Today
Author
Brian Koberlein
A study of red supergiant supernovae suggests they become dim and red just before they day.
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