https://earthsky.org/astronomy-essentials/how-far-is-betelgeuse/
How far is Betelgeuse, the famous red supergiant star?
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https://edmontonjournal.com/news/astronomer-predicts-that-a-red-supergiant-star-nearby-could-go-supernova-very-soon/wcm/17a14ec1-888d-49a2-9962-626e16295b0b
Astronomer predicts that a red supergiant star nearby could go supernova very soon | Edmonton...
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