Environment

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Dead satellites are filling space with trash. That could affect Earth’s magnetic field | Sierra Solter [Guardian, opinion] (www.theguardian.com)

submitted 7 months ago by [email protected] to c/[email protected]

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cross-posted from: https://sopuli.xyz/post/11636550

Opinion piece by Sierra Solter, "a plasma physicist, engineer, and inventor who studies the intersection of heliophysics and aerospace". Relevant quote:

Upon investigating just how much dust in the form of satellite and rocket debris the space industry has dumped into the ionosphere during re-entry, I was alarmed to find that it is currently multiple Eiffel Tower’s worth of metallic ash. I wouldn’t have even been able to calculate that at all without a scientist’s personally run website. Our ozone is mere pennies thick, and soon we will be putting at least an Eiffel Tower’s worth of metallic ash a year directly into the ionosphere. And all of that will stay there, indefinitely.

How could we possibly think that burning trash in our atmosphere 24/7 is going to be fine?

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[–] [email protected] 7 points 7 months ago (2 children)

Scientists estimate that about 48.5 tons (44 tonnes or 44,000 kilograms) of meteoritic material falls on Earth each day. Almost all the material is vaporized in Earth's atmosphere

There's been 44 tons of material swept up by earth each day since time immemorial. Let me know once we're up to 20 tons of sats a day ( about 25 starlink sats ), and then I'll start to worry about the effects.

[–] [email protected] 5 points 7 months ago* (last edited 7 months ago) (1 children)

This article isn't just about random raw materials entering the atmosphere, it's specifically about the potential dangers of pollution of the magnetosphere and ionosphere with magnetic metal dust. The author claims to be the only one out there studying this but isn't the only one who has expressed such concern. From the conclusion:

“Our technical civilization poses a real danger to itself,” Carl Sagan warned in his 1997 book Billions and Billions: Thoughts on Life and Death at the Brink of the Millennium. The magnetosphere is our first line of defense against an otherwise lethal solar system, and any pollution of it should be intensely studied and monitored. Indeed, if an asteroid the size of a Starlink satellite was headed towards Earth, it would activate planetary defense monitoring. But since it’s a human-made object impacting the atmosphere, we don’t monitor it at all.

Space companies need to stop launching satellites if they can’t provide studies that show that their pollution will not harm the stratosphere and magnetosphere. Until this pollution is studied further, we should all reconsider satellite internet.

[–] [email protected] 2 points 7 months ago

The earth sweeps up tons of space dust, including metal dust, on a daily basis. Why is there any reason to think satellites burning up behave any differently?

[–] [email protected] 6 points 7 months ago (2 children)

Unlike meteorites, which are small and only contain trace amounts of aluminum, these wrecked spacecraft are huge and consist entirely of aluminum and other exotic, highly conductive materials.

[–] [email protected] 2 points 6 months ago

Orbital space is really incredibly empty.

What we have much more to worry about is the magnetic polar reversal which will happen soon. While this is happening the magnetic field is erratic and may even diminish significantly. That will have a huge effect on both sats and life on earth, though we still have the atmosphere to protect us too.

PS: I really wonder what will happen with all the radioactive particles trapped in the van allen belts, I assume they will run amok all over the place then.

[–] [email protected] 4 points 7 months ago

Meteorites carry plenty of metals, including aluminium and other highly conductive materials. Also, aluminium does not get anywhere near superconductive in space temps, which the author claims happens. That alone should tell you how much credence to give the rest of their claims.