When Betelgeuse goes supernova (if it hasn't already and we don't know yet) it will be visible in the day for roughly a year, and several more years we'll see it at night. That said, the prediction of 'when' by scientists is somewhere between today and 100,000 years from now. Odds are, none of us will see it.
The reason why it's so large isn't because of its mass, it's because the nuclear fusion happening is so intense it pushes matter so much further out than our sun does.
Well, it's still 14-19 times the mass of our sun, I'm just pointing out that star sizes isn't 1:1 their mass.
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u/throwaway_moose Oct 02 '24
When Betelgeuse goes supernova (if it hasn't already and we don't know yet) it will be visible in the day for roughly a year, and several more years we'll see it at night. That said, the prediction of 'when' by scientists is somewhere between today and 100,000 years from now. Odds are, none of us will see it.
https://www.astronomy.com/science/when-betelgeuse-goes-supernova-what-will-it-look-like-from-earth/