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

    • KnightontheSun@lemmy.worldEnglish
      9·
      5 months ago

      Whereas we are smack dab in the middle of cities, but just far enough out of reach to be stuck with 20Mb DSL that will never improve.

      • oatscoopEnglish
        6·
        5 months ago

        I’m a 7 minute drive from downtown and my options are satellite, cellular, or fixed wireless. Everyone around me has gigabit ethernet, but due to costs involved in running fiber and the fact my little community is mostly old folks (and thus likely not going to buy in) ISPs don’t want to “invest” in us.

      • afraid_of_zombies@lemmy.worldEnglish
        1·
        5 months ago

        I don’t know how much has changed, I did an internship with a major ISP while I was a student, at the time I was told that the stronger the local government the less fiber there was. And it came because of the tax code.