A red supergiant star is surrounded by a sphere of dust and gas so large there is no known explanation for what produced it
Več na: https://www.newscientist.com/article/2489886-a-vast-bubble-around-a-dying-star-is-too-big-to-comprehend/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
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