Monster variable red supergiant Betelgeuse now may be officially behaving..."weird" [https://www.cnet.com/news/huge-red-star-might-explode-soon-and-next-few-weeks-are-critical/]. By "now" I mean it was maybe officially behaving weird approximately 650 years ago and we're just seeing it now, I just want to get that necessary disclaimer out of the way to avoid the inevitable "it's 650ly away, this happened 650 years ago and we're only seeing it now" post. Either way, I'm speaking in present tense, eat it and eat it raw.
If you haven't heard, Betelgeuse dimmed to nearly one-third its normal luminosity over the past month. It's a variable star, it does that. What makes this anomalous, is it's dimmer than usual, and it's been dimmer longer than usual. We've known for a while Betelgeuse is at the end of its approximately 10 million-year lifespan, and is due to pop at some time in the next hundred thousand years.
By "pop" I mean it's going to go supernova, and it's big enough and close enough the supernova will be as bright as the Moon for approximately a month. It's far enough away it poses no threat, but it's close enough when it goes we'll have a few hours' advance notice in the form of a monster neutrino burst we can't possibly miss.
It's no guarantee this is about to happen. Discussion is being heavily disclaimed with "it does this"; it could be a longer or deeper cycle than usual, a convergence of cycles, or some change in its cycles as it approaches death. Or aliens building the universe's stupidest Dyson sphere around it. "ZOMG Beetlejuice gonna asplode!" article blasts have hit the net before, and it could be nothing. If it starts brightening in the next week or two, back to business as usual. Even if this is the star's death rattle, it may not happen any time soon.
But it's still something to keep an eye on, if you're not already.
If you haven't heard, Betelgeuse dimmed to nearly one-third its normal luminosity over the past month. It's a variable star, it does that. What makes this anomalous, is it's dimmer than usual, and it's been dimmer longer than usual. We've known for a while Betelgeuse is at the end of its approximately 10 million-year lifespan, and is due to pop at some time in the next hundred thousand years.
By "pop" I mean it's going to go supernova, and it's big enough and close enough the supernova will be as bright as the Moon for approximately a month. It's far enough away it poses no threat, but it's close enough when it goes we'll have a few hours' advance notice in the form of a monster neutrino burst we can't possibly miss.
It's no guarantee this is about to happen. Discussion is being heavily disclaimed with "it does this"; it could be a longer or deeper cycle than usual, a convergence of cycles, or some change in its cycles as it approaches death. Or aliens building the universe's stupidest Dyson sphere around it. "ZOMG Beetlejuice gonna asplode!" article blasts have hit the net before, and it could be nothing. If it starts brightening in the next week or two, back to business as usual. Even if this is the star's death rattle, it may not happen any time soon.
But it's still something to keep an eye on, if you're not already.