/sci/ - Science & Math » Thread #11346464

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Betelgeuse dimming

Anonymous Thu 30 Jan 22:00:45 2020 No.11346464 View Reply Original Report

Quoted By: >>11346561 >>11347449 >>11347462 >>11347549 >>11347564

https://www.cnn.com/2020/01/25/world/betelgeuse-star-dimming-scn-trnd/index.html

Possibly going full supernova. Anything to worry about, or just a cool light show? Will we get a more accurate supernova date in the future or are we just waiting and watching?

Anonymous

Anonymous Thu 30 Jan 2020 22:21:51 No.11346516 Report

Quoted By:

Could definitely turn into a black hole. But that'd be best case scenario i guess

Anonymous

Anonymous Thu 30 Jan 2020 22:41:29 No.11346561 Report

Quoted By: >>11346747

>>11346464
How long does it take for a star's core to collapse again? I remember doing a problem like this in college where we calculated the potential energy of the iron core, converted it to kinetic energy (as the core collapses) and found the velocity. Then with the radius of the star we could calculate how long it takes for the core to collapse. But I just don't remember what kind of answer we got.

Just asking because the article said LIGO detected gravitational waves in the direction of Betelgeuse a couple weeks ago.

Anonymous

Anonymous Thu 30 Jan 2020 22:44:05 No.11346577 Report

Quoted By:

Haha fuck you Betelgeuse

Anonymous

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Anonymous Thu 30 Jan 2020 22:57:20 No.11346626 Report

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It's already started brightening again, and the dimming was nothing out of the ordinary for a variable star (just a little more extreme than its usual pattern)

Anonymous

Anonymous Thu 30 Jan 2020 23:35:12 No.11346747 Report

Quoted By:

>>11346561
>Just asking because the article said LIGO detected gravitational waves in the direction of Betelgeuse a couple weeks ago.
The supernova would have been seen a few milliseconds later.

Anonymous

Anonymous Fri 31 Jan 2020 05:47:39 No.11347449 Report

Quoted By:

>>11346464
It's a variable freaking star you idiot. It dims and brightens all the time.

Anonymous

Anonymous Fri 31 Jan 2020 05:53:29 No.11347462 Report

Quoted By: >>11347474

>>11346464
If we're seeing it now, that means it already happened a billion years ago

Anonymous

Anonymous Fri 31 Jan 2020 05:57:08 No.11347474 Report

Quoted By:

>>11347462
Approximately 700 years ago.

Anonymous

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Anonymous Fri 31 Jan 2020 06:27:27 No.11347530 Report

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Anonymous

Anonymous Fri 31 Jan 2020 06:33:59 No.11347549 Report

Quoted By:

>>11346464
It ate its companion star which is where the extra nitrogen in its atmosphere came from. This means we have overestimated its age. It has anywhere from 100,000-1,000,000 years left.

Anonymous

Anonymous Fri 31 Jan 2020 06:39:28 No.11347564 Report

Quoted By:

>>11346464
>Betelgeuse
>"It is a distinctly reddish semiregular variable star whose apparent magnitude, varying between +0.0 and +1.3, has the widest range displayed by any first-magnitude star."

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