[Arxiv Preprint] Betelgeuse to go supernova in in decades (not centuries)

From my POV on Earth, I hope it happens in my lifetime.

Same.
I don't plan on dying (not much choice in the matter anyway, as a tentative believer in the quantum immortality clause of the many worlds theory), so I'm looking forward to it regardless. However, I would love to share the experience with my family, so if it goes off in the span of a typical lifetime from now, that's even better.

While this is far from definitive, as stated in the article, it sure is damned exciting. Never mind solar eclipses, when was the last time a supernova was visible to the naked eye? I've read estimates that when Betelgeuse goes off, it might be bright enough to be visible during the daytime. That's wild.

Wow, I haven't clicked on a source with literal pages of straight math equations in a long time. Really gives some good perspective on the difficulty of astronomy.

I really don't like how science communication is typically done, which is all of the math is stripped out, and all the ideas are told as if they were thought experiements, and it makes it easy to get the impression that what scientists do all day is just think abstractly about stuff.

So that's why I linked the preprint directly. Just note that this is a preprint, and it hasn't yet been peer-reviewed, and, of course, not all of the work is shown in any article, even a scientific one.
- As someone in a scientific field, I really appreciate an actual paper making it to the front page! Thanks for posting! ~~(also my very first comment on my beehaw 😎)~~
Yeah I took a few Astronomy classes as electives in college. Astronomy is NOT easy or simple at all. Lots and lots of very complicated math and extrapolation from limited data happen there.

This is incredible! It seems like there's going to be a noticeable change in the night sky! As someone who's just getting into astrophotography, I wonder if it's something I'll be able to capture.

Many people are asking from which point of view. It’s always from our point of view, the observer. So they mean we might see it in a few decades, it will then have happened ~600years ago

I wonder how wildlife will react to having a second light in the night sky.

That's a super interesting question. The most recent supernova in our galaxy was Kepler's Star in the early 1600s. However, that supernova was over 20,000 lightyears away. This one will be over 33 times closer and, assuming a similar luminosity of the explosion, 1100 times brighter (due to 1/r^(2))

Kepler's Supernova had an apparent magnitude of about -2.5, so Betelgeuse's supernova will be about ~~-5.5~~ (According to wikipedia, it's expected to be -12.4) For reference, the moon is -12.7, and the sun is -27. So it will be a bright boy.

I do not know if wildlife reacted much to the Kepler Supernova, but it is possible. You might be able to find records on the fact if you go digging.
- Thanks for the explanation, it is very clear. I am ready for Moon 2.0
Moths will be vexed.
How bright will it be? Will we lose complete darkness at night? That would be a huge bummer.
- It’ll be about as bright as a full moon, but obviously it won't be as big. The light will be concentrated in a much smaller point. It'll "drown out" some of the other stars you would usually be able to see, but the night won't suddenly be super bright at all times.

Dr. Becky had a great segment about this in her video yesterday!

https://youtu.be/3QgLwpuDGhI?t=415

Excellent video! I loved how she picked apart the figures in the video and gave some additional context.
- I can't recommend her channel enough, her videos are fantastic.

can someone explain if the light of its supernova will reach us in our lifetime?

Yes. Because if it's due to go supernova in the next few decades from our point of view, then it has already gone supernova, and the light from it is currently enroute. The star is 600 lightyears away.
- 'a few tens' - so approximately 30 years, give or take a decade or two?
- is it from our own point of view or its point of view? other guy said the opposite lol. idk what to believe
We can only view it from where we are in spacetime , and thus all the date we have on it is from our own reference frame. Any predictions about its fate are based on OUR viewpoint, not that of a point many light years away.

There is literally no way for us to know if it has "already" gone supernova. That reality has not reached us yet, and is therefore nonsensical to talk about.
According to google it's 642 Light years away. As in, it takes 642 years until the light reaches us. So you probably won't live to see it.
- That's not how this works. Our estimates are based on our observations, that are also 642 years late. So if it's going to blow up in say 30 years, in reality it already gone supernova 612 years ago, and we're only gonna see it in 30 years.

Big (explosion) if true

Good, I hate waiting.