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Why is Betelgeuse glowing so brightly and behaving so strangely?

theguardian.com

31–40 of 81 posts

Re: Why is Betelgeuse glowing so brightly and behaving so strangely?

#31
post #27

>There are records from ancient Egypt of what appears to be a star exploding as a supernova. The Egyptians described the appearance of a “second sun” in the sky, says Webb. That statement interests me, I did a search and the closest thing I found was SN 1006: https://en.wikipedia.org/wiki/SN_1006 But that did not come close to the brightness of the Sun and it happened a bit over 1000 years ago. To me, ancient Egypt r…

Maybe a comet?

Re: Why is Betelgeuse glowing so brightly and behaving so strangely?

#32

When it explodes, Betelgeuse is expected to be brighter than the full moon. Gamma ray bursts appear to follow the axis of rotation of the star, and since that axis does not point directly at Earth (it is off by about 20 degrees), that's not a threat. So it will be exciting, scary and safe - like a rollercoaster that everyone on Earth gets to ride at the same time.

Ah. About that "gamma bursts appear to follow the spin axis" rule - do Earth's astronomers have good data, with a comfortable n, to justify confidence that their little planet can't possibly get toasted by this rather large and unstable stellar neighbor? Asking for a friend.

Turns out they are wrong, what are you gonna do about it? "Betelgeuse... no... stop..."

Re: Why is Betelgeuse glowing so brightly and behaving so strangely?

#33

When it explodes, Betelgeuse is expected to be brighter than the full moon. Gamma ray bursts appear to follow the axis of rotation of the star, and since that axis does not point directly at Earth (it is off by about 20 degrees), that's not a threat. So it will be exciting, scary and safe - like a rollercoaster that everyone on Earth gets to ride at the same time.

How would this affect satellites?

Re: Why is Betelgeuse glowing so brightly and behaving so strangely?

#34
post #22

Earlier quoted context omitted.

If it does I hope people will look to the stars more and reflect on their beautiful place in the universe. I can hardly envision a more navel gazing species than humans, and we need more people with telescopes and wide views.

Do any other species even have navels?

https://en.m.wikipedia.org/wiki/Orange_(fruit)#Navel

Re: Why is Betelgeuse glowing so brightly and behaving so strangely?

#35
post #27

>There are records from ancient Egypt of what appears to be a star exploding as a supernova. The Egyptians described the appearance of a “second sun” in the sky, says Webb. That statement interests me, I did a search and the closest thing I found was SN 1006: https://en.wikipedia.org/wiki/SN_1006 But that did not come close to the brightness of the Sun and it happened a bit over 1000 years ago. To me, ancient Egypt r…

Are you looking back far enough? Ancient Egypt really fucking ancient. Like it was about as ancient to classical antiquity as classical antiquity is to us now.

Re: Why is Betelgeuse glowing so brightly and behaving so strangely?

#36
post #27

>There are records from ancient Egypt of what appears to be a star exploding as a supernova. The Egyptians described the appearance of a “second sun” in the sky, says Webb. That statement interests me, I did a search and the closest thing I found was SN 1006: https://en.wikipedia.org/wiki/SN_1006 But that did not come close to the brightness of the Sun and it happened a bit over 1000 years ago. To me, ancient Egypt r…

[deleted]

Re: Why is Betelgeuse glowing so brightly and behaving so strangely?

#37

Earlier quoted context omitted.

Ah. About that "gamma bursts appear to follow the spin axis" rule - do Earth's astronomers have good data, with a comfortable n, to justify confidence that their little planet can't possibly get toasted by this rather large and unstable stellar neighbor? Asking for a friend.

Turns out they are wrong, what are you gonna do about it? "Betelgeuse... no... stop..."

Prosecute the astronomers for inaccuracy in their warnings.

"Italian scientists convicted for not warning about deadly 2009 quake"

https://www.cbsnews.com/news/italian-scientists-convicted-fo...

Re: Why is Betelgeuse glowing so brightly and behaving so strangely?

#39
Just to get things back into proportion, Betelgeuse is one of several hundred pulsating red supergiants visible with the unaided eye, binoculars or a small telescope (here are some around the Double Cluster in Perseus: https://www.dritter.net/astronomy/clusters/ngc869-884_03.asp...). Many of these are significantly more luminous than Betelgeuse, and it is far more probable (just from the numbers) that one or more of these will turn supernova before Betelgeuse does. The recent fade and subsequent brightening of Betelgeuse are fairly typical behaviour for pulsating red supergiants, and are probably not relevant to whether it is about to turn supernova or not.
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