SpaceX's Starlink May Be Keeping the Ozone From Healing, Research Finds
SpaceX's Starlink May Be Keeping the Ozone From Healing, Research Finds
SpaceX's growing Starlink megaconstellation could be hindering the Earth's ozone layer from healing itself, researchers find.
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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I hate Elon, but he ain't the only one trashing the LEO
Okay, but he's trashing it the fastest and for the dumbest reasons.
If I have to compare, giving people in underserved areas access to the Internet is a better reason than spy sats or satellite TV.
Tv is still kinda important, like backup of streaming Tv (freely&freesat)