• expatriado@lemmy.world
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    2 days ago

    communication satellites are low earth orbit to reduce latency, that means +25000 km/h velocity to sustain orbit, and would also have a very shallow entry angle, that combination means total vaporization

    • CookieOfFortune@lemmy.world
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      2 days ago

      Low earth orbit is most survivable reentry trajectory… coming in at a higher angle significantly increases the heating.

      • WoodScientist@lemmy.world
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        2 days ago

        The vaporized materials themselves are a problem. When we’re building these mega-constellations, we’re putting some real mass up there. We’re introducing all sorts of exotic materials into the stratosphere that would not naturally occur there at those concentrations. And remember, this is a very sensitive environment. The actual volume of CFCs we introduced into the stratosphere wasn’t that large. The volume of all our AC refrigerant and hair spray cans was nothing compared to the atmosphere. We may actually not be that far from the sheer volume of satellites affecting the ozone layer as they decay.

        The stratosphere is an environment like any other. It has a finite ability to absorb and process any form of pollution without noticeable and significant effects. I’m not qualified enough to estimate the number of satellite reentries to damage the ozone layer or to have other deleterious effects, but at least from that study featured in that video, we may not be far off. The story of civilization has been repeatedly realizing that what we once considered infinite dumping grounds were anything but. And the stratosphere is no different.

    • MinnesotaGoddam@lemmy.world
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      2 days ago

      i mean, with that many satellites what are the odds (i have the smoked 2 joints stupids) something fucks up and it doesn’t come in at that shallow entry angle?