this post was submitted on 16 Jun 2023
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[Arxiv Preprint] Betelgeuse to go supernova in in decades (not centuries) (arxiv.org)
submitted 1 year ago by OmnipotentEntity@beehaw.org to c/science@beehaw.org
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[–] 0xtero@kbin.social 11 points 1 year ago* (last edited 1 year ago)

It's always from our PoV.
We have no idea and no way of knowing what's actually happening 600 ly. away, right now.
All our measurements are based on the light and radiation we can observe from here. We have no sensors close to it.
So if the paper is calculating supernova in couple of decades, it means the star actually went supernova 600+ years ago.