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/sci/ - Science & Math

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11346464 No.11346464 [Reply] [Original]

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?

>> No.11346516

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

>> No.11346561

>>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.

>> No.11346577

Haha fuck you Betelgeuse

>> No.11346626
File: 216 KB, 610x403, 101.png [View same] [iqdb] [saucenao] [google]
11346626

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)

>> No.11346747

>>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.

>> No.11347449

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

>> No.11347462

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

>> No.11347474

>>11347462
Approximately 700 years ago.

>> No.11347530
File: 53 KB, 1920x1080, Betelgeuse Supernova.jpg [View same] [iqdb] [saucenao] [google]
11347530

>> No.11347549

>>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.

>> No.11347564

>>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."