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Unverified50% confidenceFactExact time

The outer atmospheres of red supergiants are extremely tenuous and dynamically changing, and stellar pulsation, convection, and mass ejection make it impossible to clearly define a boundary between the stellar surface and the stellar wind, so there is no precise upper limit on the maximum radius.

1
Sources
50%
Confidence
Long-term
Relevance
10/13/2026
First Seen

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