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Betelgeuse Betelgeuse Betelgeuse

06/16/2021 4:43 PM

Could this be the phenomena that plunges the temperature on Earth into an ice age at the roughly 100k year intervals called the Milankovitch cycle?

"Scientists finally know why giant star Betelgeuse dimmed mysteriously

The study includes new analysis of images taken in 2019 and 2020 of the star, which is just over 700 light-years away from Earth, showing that during its Great Dimming, Betelgeuse was actually being obscured by its own stellar exhalations.

"We have directly witnessed the formation of so-called stardust," Montargès, who led the observation campaign using the European Southern Observatory's Very Large Telescope in Chile, said in a statement."...

https://www.cnet.com/news/scientists-finally-know-why-giant-star-betelgeuse-dimmed-mysteriously/

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#1

Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 4:56 PM

Maybe this is happening...

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#2

Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 5:02 PM

Interesting article. Thanks !

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#3

Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 5:08 PM

Interesting,... So at 700 light-years away, that’s old news...

For all we know... Betelgeuse already went supernova 350 years ago,... and we won’t know it for another 350 years before we find out.

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#4

Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 5:15 PM

Don't blink for the next 100,000 years, you don't want to miss that supernova!

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#5
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Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 5:21 PM

Ok,... I won’t...

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#6

Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 7:43 PM

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#7
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Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 8:27 PM

Being only 650-700 light years away... that’s pretty close for a super nova...

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#9
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Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 8:53 PM

..."Whenever Betelgeuse does blow up, our planet Earth is too far away for this explosion to harm, much less destroy, life on Earth. Astrophysicists say we'd have to be within 50 light-years of a supernova for it to harm us. Betelgeuse is nearly 10 times this distance.Feb 4, 2021"...

Wheeeew....that was close

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#8
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Re: Betelgeuse Betelgeuse Betelgeuse

06/16/2021 8:37 PM

That post reminds me of a past CR4 member, case491 who had posted a good comparison...

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#11
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Re: Betelgeuse Betelgeuse Betelgeuse

06/17/2021 11:46 AM

My sister teaches junior high science. She uses this 1,000 yard walk exercise to give kids a perspective on relative sizes and spacing in our solar system. It's a little outdated and still lists Pluto as a planet but it is an eye opener and very effective as a teaching tool.

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#12
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Re: Betelgeuse Betelgeuse Betelgeuse

06/17/2021 12:04 PM

I just posted something similar on the previous link on perspective.

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#18
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Re: Betelgeuse Betelgeuse Betelgeuse

06/18/2021 10:23 AM

"We are so small between the stars, so large against the sky." - Leonard Cohen, from the song "Stories of the Street"

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#10

Re: Betelgeuse Betelgeuse Betelgeuse

06/17/2021 10:51 AM

According to the weather report, here in the southwest we are under an excessive heat warning. So maybe being plunged into an ice age doesn't sound so bad,,,

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#13
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Re: Betelgeuse Betelgeuse Betelgeuse

06/17/2021 2:22 PM

I'm sure climate scientists will tell us it's no problem, now that we have control of Earth's climate, we just need to burn more fossil fuels, and eat beans....

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#14

Re: Betelgeuse Betelgeuse Betelgeuse

06/17/2021 3:43 PM

Could this be the phenomena that plunges the temperature on Earth into an ice age at the roughly 100k year intervals called the Milankovitch cycle?

I don't see how Betelgeuse could be connected to the 100,000 year cycle.

https://en.wikipedia.org/wiki/100,000-year_problem

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#15
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Re: Betelgeuse Betelgeuse Betelgeuse

06/17/2021 4:35 PM

Well not specifically Betelgeuse, but the outflow from a star, like our Sun or perhaps a much larger star, could create a dimming of solar irradiance that could answer this question....Maybe there's a giant dust cloud that passes through the Solar system every 100k years or so....If so, it should be getting close...relatively speaking...maybe it's changing, becoming less dense, or the orbital path is changing...who knows

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#16
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Re: Betelgeuse Betelgeuse Betelgeuse

06/17/2021 6:31 PM

We're just along for the ride . . . . Enjoy the view.

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#20
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Re: Betelgeuse Betelgeuse Betelgeuse

06/21/2021 7:20 PM

Turns out we are...lol

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#17
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Re: Betelgeuse Betelgeuse Betelgeuse

06/17/2021 6:44 PM

..."While there is a Milankovitch cycle in the range of 100,000 years, related to Earth's orbital eccentricity, its contribution to variation in insolation is much smaller than those of precession and obliquity. The 100,000-year-problem refers to the lack of an obvious explanation for the periodicity of ice ages at roughly 100,000 years for the past million years, but not before, when the dominant periodicity corresponded to 41,000 years. "...

δ18O ..a proxy for temperature, for the last 600,000 years (an average from several deep sea sediment carbonate samples)

As you can see from the chart the dips refer to warm periods, and we are currently at the average high temperature between ice ages...going back 1/2 million years ago, you can see that something happened, the ups and downs were more frequent and less pronounced, which I would say accounted for the effects noted in the Milankovitch cycle calculations...but then something happened, since then, the ups and downs have been trending to more radical extremes, and at longer intervals.....

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#19
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Re: Betelgeuse Betelgeuse Betelgeuse

06/19/2021 8:04 AM

It seems there are a lot of possible explanations. Where there is feedback and delay you get oscillations. We have about 90000 years until the next ice age. Hopefully we will have it figured out by then, provided that congress acts immediately.

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#21
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Re: Betelgeuse Betelgeuse Betelgeuse

06/21/2021 10:12 PM

Some are under the delusion that we are in control.

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