We've been burning space junk for years to get rid of the problem.That turned out to be a bad idea

For decades, the aerospace industry has found a consensus solution to the problem of space junk: burn it.A fairly simple phenomenon…

For decades, the aviation industry has had a consensus solution to the problem of space travel: it burns.A relatively simple phenomenon based on the re-entry of a satellite when its useful life in the atmosphere ends, so it begins to suffer friction and disintegrate completely.But the reality is that we are faced with a huge problem, because physics reminds us that matter is neither created nor destroyed.

We got it.Science knows we don't destroy space junk, we just vaporize it into metallic aerosols that change the chemistry of our skies.The definitive proof of this problem came on the night of February 19, 2025, when a group of German researchers pointed a laser beam into the Kuhlungsborn sky.

In this case, what they discovered at an altitude of 100 kilometers, in the thermosphere, shouldn't be there, because there were large amounts of lithium there.And not without reason, since it mixed in several hours earlier with the re-entry of the SpaceX Falcon 9 rocket, which had broken up in the Atlantic between Ireland and England.

something new.The signal measured in this case was not very subtle, because it was 10 times higher than the normal concentration in that region, and this discovery is collected in the article because it is a major milestone: it is the first time that metal contamination released from a certain piece of space junk has been observed "alive" and at the exact moment of combustion from Earth.

Metallic ice. This phenomenon is not an isolated phenomenon in our society, but a sign of the structural changes we are facing. In 2023, a group of researchers used different equipment to analyze more than 50,000 aerosol particles in the stratosphere, the layer where the ozone layer is located about 15-30 km above sea level.

What did they see?Historically, the metals found in the stratosphere came from meteorites that entered our planet.Today, it is estimated that 210 tons of aluminum per year are released into the atmosphere due to the breakup of satellites and rockets, compared to 20 tons per year that come naturally from meteors.

But lithium is not the only metal in the atmosphere of our world, since scientists have discovered more than 20 elements, among which aluminum, copper, lead or silver are outstanding ... It is something that does not fit the normal composition of meteorites, but it matches the material used by various aerospace companies to build their rockets and satellites.

No planning.The speed of launches has increased dramatically in recent years, and if we have 10,000 objects orbiting the Earth today, we should know that Starlink alone wants to have more than 40,000 satellites in low Earth orbit.But the problem is that these devices have a short lifespan, so their inevitable fate evaporates over our heads.

Its effects.The science here is clear that the effects of filling the stratosphere with these metals are currently unknown.But the predictions suggest we shouldn't be complacent, as elements like aluminum and copper are important reagents that can damage the delicate ozone layer.

Furthermore, metallic particles can act as special condensation nuclei, altering the microphysics of polar stratospheric clouds.And if that weren't enough, the addition of anthropogenic components to sulfuric acid aerosols alters their size and ability to scatter sunlight.Ironically, we are altering the reflectivity of the stratosphere, the same layer that some scientists want to use for climate geoengineering, without knowing what the results will be.

The frontier of the planet.The models here suggest that if the planned mega-constellations become reality, the proportion of stratospheric particles contaminated with aluminum from satellites will increase from the current 10% to about 50%.In other words, the load of metals in the stratosphere can grow by about 40% compared to natural levels.

For many years now, space agencies have believed that satellite disintegration is a completely harmless and clean practice.The Falcon 9 example, confirming the warnings of the scientific community, shows us that the Earth's orbit and our atmosphere form an interconnected ecosystem.So, launching tens of thousands of objects into space and then burning them on our own roof may be a solution to keep space clean, but in return we pollute the sky.

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