Unabated Carbon Is Shrinking Earth\'s Upper Atmosphere, Scientists Warn...

[Fred Bloggs]

Article:

Given that the thermosphere extends out to several hundred kilometers, that 342 meters might not seem like a lot. However, a paper published in September by physicist Ingrid Cnossen of the British Antarctic Survey in the UK showed that thermospheric cooling could result in a 33 percent reduction in atmospheric drag by 2070.

Atmospheric drag is what helps satellites and rocket stages deorbit after their missions end. This reduction in drag could prolong the orbital lifespan of defunct space junk by 30 percent by 2070, Cnossen found.

As more and more satellites are launched into low-Earth orbit, this is going to become an increasing problem, with no real mitigation measures in sight – either to decrease the number of satellites, or the amount of CO2.

https://www.sciencealert.com/unabated-carbon-is-shrinking-earths-upper-atmosphere-scientists-warn

So getting hit by falling space debris will put you out of the misery of being cooked to a crisp by excessive heat.

 

[Anthony William Sloman]

On Monday, May 22, 2023 at 2:40:23 AM UTC+10, Fred Bloggs wrote:

Article:

Given that the thermosphere extends out to several hundred kilometers, that 342 meters might not seem like a lot. However, a paper published in September by physicist Ingrid Cnossen of the British Antarctic Survey in the UK showed that thermospheric cooling could result in a 33 percent reduction in atmospheric drag by 2070.

Atmospheric drag is what helps satellites and rocket stages deorbit after their missions end. This reduction in drag could prolong the orbital lifespan of defunct space junk by 30 percent by 2070, Cnossen found.

As more and more satellites are launched into low-Earth orbit, this is going to become an increasing problem, with no real mitigation measures in sight – either to decrease the number of satellites, or the amount of CO2.

So it\'s probably time that we got around to taking active measures to get rid of space junk.

https://www.sciencealert.com/unabated-carbon-is-shrinking-earths-upper-atmosphere-scientists-warn

So getting hit by falling space debris will put you out of the misery of being cooked to a crisp by excessive heat.

The small stuff burns up completely before it get low enough to hit anybody.. It makes life difficult for astronomers until it burns up, but that\'s not in the same ball-park \"as getting cooked by excess heat\" or - to be more realistic about it - getting drowned by an unusually energetic cyclone.

--
Bill Sloman, Sydney

 

[John Larkin]

On Sun, 21 May 2023 09:40:18 -0700 (PDT), Fred Bloggs
<bloggs.fredbloggs.fred@gmail.com> wrote:

Article:

Given that the thermosphere extends out to several hundred kilometers, that 342 meters might not seem like a lot. However, a paper published in September by physicist Ingrid Cnossen of the British Antarctic Survey in the UK showed that thermospheric cooling could result in a 33 percent reduction in atmospheric drag by 2070.

Atmospheric drag is what helps satellites and rocket stages deorbit after their missions end. This reduction in drag could prolong the orbital lifespan of defunct space junk by 30 percent by 2070, Cnossen found.

As more and more satellites are launched into low-Earth orbit, this is going to become an increasing problem, with no real mitigation measures in sight – either to decrease the number of satellites, or the amount of CO2.

https://www.sciencealert.com/unabated-carbon-is-shrinking-earths-upper-atmosphere-scientists-warn

So getting hit by falling space debris will put you out of the misery of being cooked to a crisp by excessive heat.

If low-orbit satellites last longer, fewer will need to be launched.

Every launched LEO satellite will eventually re-enter.

Cold kills more people than heat.

You seem to be afraid of everything, no matter how improbable. That\'s
unfortunate.

https://en.wikipedia.org/wiki/Panphobia

https://en.wikipedia.org/wiki/Generalized_anxiety_disorder

Excessive fear inhibits electronic design. Design requires some
risk-taking. I had one intern who was so afraid of being shocked that
he wouldn\'t touch the top of an FPGA to see how warm it is.

Phobic people are afraid of physically harmless things like violating
SCPI syntax conventions and other \"rules\", or running parts near abs
max specs, or testing parts to destruction, or driving the grids/gates
of tubes or depletion fets positive. Or inventing things.

https://www.dropbox.com/s/cfc8394y6ny8hai/Afraid.jpg?raw=1

Has anyone on Earth ever been killed by a re-entering satellite?

 

[whit3rd]

On Sunday, May 21, 2023 at 11:36:39 AM UTC-7, John Larkin wrote:

You seem to be afraid of everything, no matter how improbable. That\'s
unfortunate.

https://en.wikipedia.org/wiki/Panphobia

https://en.wikipedia.org/wiki/Generalized_anxiety_disorder

And more on this subject...

Larkin Syndrome: perceiving fear, hysteria, panic in every situation

 

[John Larkin]

On Sun, 21 May 2023 13:30:50 -0700 (PDT), whit3rd <whit3rd@gmail.com>
wrote:

On Sunday, May 21, 2023 at 11:36:39?AM UTC-7, John Larkin wrote:

You seem to be afraid of everything, no matter how improbable. That\'s
unfortunate.

https://en.wikipedia.org/wiki/Panphobia

https://en.wikipedia.org/wiki/Generalized_anxiety_disorder

And more on this subject...

Larkin Syndrome: perceiving fear, hysteria, panic in every situation

No, mostly in Fred\'s off-topic-terrified posts. It must be terrible to
be Fred.

But fear does keep a lot of thinking from getting done.

So does social pressure, tribalism.

 

[Anthony William Sloman]

On Monday, May 22, 2023 at 4:36:39 AM UTC+10, John Larkin wrote:
> On Sun, 21 May 2023 09:40:18 -0700 (PDT), Fred Bloggs <bloggs.fred...@gmail.com> wrote:

<snip>

> If low-orbit satellites last longer, fewer will need to be launched.

The depends on what they are doing.

Every launched LEO satellite will eventually re-enter.

Cold kills more people than heat.

At the moment. Heat waves do kill people too.

You seem to be afraid of everything, no matter how improbable. That\'s
unfortunate.

https://en.wikipedia.org/wiki/Panphobia

https://en.wikipedia.org/wiki/Generalized_anxiety_disorder

Excessive fear inhibits electronic design.

Some fear limits the number of components you blow up.

> Design requires some risk-taking.

Reading and understanding data sheets can reduce the risks considerably.

> I had one intern who was so afraid of being shocked that he wouldn\'t touch the top of an FPGA to see how warm it is.

Sounds sensible. Surface contact temperature sensors are more accurate. and there\'s less risk of blowing up the circuit with your own accumulated electrostatic charge.

> Phobic people are afraid of physically harmless things like violating SCPI syntax conventions and other \"rules\", or running parts near abs max specs, or testing parts to destruction, or driving the grids/gates of tubes or depletion fets positive. Or inventing things.

By \"phobic people\" John Larkin means those who don\'t get off on taking unnecessary risks, or shrimps who have to compensate for their unimpressive stature by breaking things.

> https://www.dropbox.com/s/cfc8394y6ny8hai/Afraid.jpg?raw=1

In John Larkin\'s case, the answer seems to be \"something stupid\".

> Has anyone on Earth ever been killed by a re-entering satellite?

Not yet.\"So how dangerous is space debris, really? Well, as far as we know only one person has ever been hit by it. Lottie Williams, a resident of Tulsa in Oklahoma, US, was struck harmlessly in the shoulder by a piece in 1997. It was about the size of her hand and thought to have come from a Delta II rocket.\"

--
Bill Sloman, Sydney

 

[Anthony William Sloman]

On Monday, May 22, 2023 at 7:09:01 AM UTC+10, John Larkin wrote:

On Sun, 21 May 2023 13:30:50 -0700 (PDT), whit3rd <whi...@gmail.com
wrote:
On Sunday, May 21, 2023 at 11:36:39?AM UTC-7, John Larkin wrote:

You seem to be afraid of everything, no matter how improbable. That\'s
unfortunate.

https://en.wikipedia.org/wiki/Panphobia

https://en.wikipedia.org/wiki/Generalized_anxiety_disorder

And more on this subject...

Larkin Syndrome: perceiving fear, hysteria, panic in every situation.

No, mostly in Fred\'s off-topic-terrified posts. It must be terrible to be Fred.

Fred isn\'t actually terrified. He\'s just reporting potential problems which John Larkin has chosen (irrationally) to ignore.

But fear does keep a lot of thinking from getting done.

So does social pressure, tribalism.

All are minor influences compared with ignorance. If John Larkin knew a bit more about what he was doing, he\'d probably be more productive, but then again he seems to make most of his money out of re-inventing the wheel for equally ill-informed customers so it might not work out for him.

--
Bill Sloman, Sydney