this post was submitted on 17 Jun 2024
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Abstract from the paper in the article:

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109280

Large constellations of small satellites will significantly increase the number of objects orbiting the Earth. Satellites burn up at the end of service life during reentry, generating aluminum oxides as the main byproduct. These are known catalysts for chlorine activation that depletes ozone in the stratosphere. We present the first atomic-scale molecular dynamics simulation study to resolve the oxidation process of the satellite's aluminum structure during mesospheric reentry, and investigate the ozone depletion potential from aluminum oxides. We find that the demise of a typical 250-kg satellite can generate around 30 kg of aluminum oxide nanoparticles, which may endure for decades in the atmosphere. Aluminum oxide compounds generated by the entire population of satellites reentering the atmosphere in 2022 are estimated at around 17 metric tons. Reentry scenarios involving mega-constellations point to over 360 metric tons of aluminum oxide compounds per year, which can lead to significant ozone depletion.

PS: wooden satellites can help mitigate this https://www.nature.com/articles/d41586-024-01456-z

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[–] FJT@lemmy.world 0 points 5 months ago (4 children)

Ozone hoax just like global warming

[–] Snowpix@lemmy.ca 0 points 5 months ago

Y'know... it's better to let everyone think you're an idiot than to prove everyone right by saying something this stupid.

[–] noktastrigo@lemmy.cafe 0 points 5 months ago* (last edited 5 months ago)

In a different timeline this would be obvious sarcasm. We are not in that timeline.

[–] Burn_The_Right@lemmy.world 0 points 5 months ago

It's some small comfort that a conservative's ability to construct a complete sentence is matched by their ability to formulate a complete thought.

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[–] Hadriscus@lemm.ee 0 points 5 months ago (1 children)

damn, starlink is my only way to access the internet. I wish there were an alternative that's usable. Traditional access providers don't work and cell data is extremely slow and there's no coverage where I live. I pay for Starlink with a bitter taste

[–] Dasus@lemmy.world 0 points 5 months ago (10 children)

Might I enquire as to where this remote location might be?

Like on a general basis, no need for addresses.

As a Finn I'm forever spoiled in terms of wireless coverage. We got tons of solitary forests. But you can get an internet connection in literally all of them.

97% of the country gets 4g. And not of the people. The country.

[–] nyctre@lemmy.world 0 points 5 months ago

Rural US most likely. Place is too big, too few people to be worth for comoanies to invest. So many places only have 1-2 providers at best, afaik.

[–] Bitflip@lemmy.ml 0 points 5 months ago

At least one hour outside any Midwest city.

[–] Dkarma@lemmy.world 0 points 5 months ago (2 children)

I love it when ppl from small countries don't get why there isn't wifi / cell coverage literally everywhere...

[–] kevindqc@lemmy.world 0 points 5 months ago

I think they're aware, given they said they're spoiled?

[–] Senshi@lemmy.world 0 points 5 months ago* (last edited 5 months ago) (2 children)

Finland is not a small country compared to its population density and distribution.

Finland has 18 inhabitants per km².

USA have 35 inhabitants per km².

[–] ILikeBoobies@lemmy.ca 0 points 5 months ago (4 children)

That’s not a good measurement as populations are not spread evenly. You could have 10 000 people per km^2 in the US then have 0.001 people per km^2 in another

[–] RunawayFixer@lemmy.world 0 points 5 months ago (8 children)

The Finn already addressed this in their first post: 97% of the country has 4g. That is country, not people in the country. So yes, a reindeer in Lapland has a better potential internet connection than many rural north americans.

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[–] enbyecho@lemmy.world 0 points 5 months ago

I live in rural California. We only just this year are able to pick up a faint LTE signal. I think it might get us a very unstable 1-2 Mbps if we hold the phone just right. We have no cable, DSL or other land-based options and because of the topography can't pick up the local wireless provider, which is very expensive anyway - like $175/month for 50/5

So without Starlink our only options are crappy regular satellite providers like Hughesnet which impose very low quotas - 10 GB monthly for day time usage - and have insane latency.

It bugs the shit out of me I have to give money to that fuckwit but without it we live in the dark ages.

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[–] ugjka@lemmy.world 0 points 5 months ago (2 children)

I hate Elon, but he ain't the only one trashing the LEO

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[–] afraid_of_zombies@lemmy.world 0 points 5 months ago (2 children)

Quite possible. Let's fix our ISPs so that all of humanity has access to bandwidth priced to a value that they can afford for their area. A huge project that means lots of union jobs and an economic payoff for decades. If we pull this off Starlink won't have any customers except very marginal cases.

Fix the problem directly instead of fixing the solution unintended side effects

[–] postmateDumbass@lemmy.world 0 points 5 months ago (6 children)

Gee, where are the boatload of billions that the US congress passed for nationwide broadband?

Fucking ripoff telecon companies.

[–] afraid_of_zombies@lemmy.world 0 points 5 months ago

I thought that program was ended in 2018?

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[–] iAvicenna@lemmy.world 0 points 5 months ago

ah but it helps Elon make money (maybe?) and Elon knows what is best for us, so that is fine

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