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Cake day: June 5th, 2023

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  • See, they say the Earth’s magnetic field is gradually getting weaker, and they’re not entirely sure why. So of course they’re doing lots of research into all sorts of theories as to why.

    Weakening of the geomagnetic field is due the pole reversal that happens periodically over time. It’s bad news, but not catastrophic.

    Well have they considered that over the past century, humans have wrapped lots of the planet with degaussing coils? We call them power lines…

    I seriously doubt that the whole of humanity’s electric infrastructure is powerful enough to interfere with the colossal magnetohydrodynamic dynamo at the core of the planet.


  • I’m skeptical about this report though. The magnetosphere extends way beyond the atmosphere where the space junk burns up. And most metal fragments reach the surface. The metal dust that may remain suspended in the ionosphere doesn’t have the ability to block the magnetic field (the ionosphere already has a distinct sodium layer). All that aside, there are tonnes of metallic meteoroids entering the atmosphere every day without any issues.

    The other reports I’ve seen suggest damage to the ozone layer and ionosphere due to rocket exhaust during the ascent.






  • The latter - targeting from ground. While that sounds daunting, it’s already possible. Sats can aim data laser beams at other sats at even higher relative speeds.

    Beam decoherence is a pretty big problem when you are lasering through the entire atmosphere, and both scenarios require an astounding degree of precision.

    Beam coherence is the only problem with targeting sats from the ground. But remember, these sats come with big telescopes to collect as much light as they can. It may not take a lot of radiative flux to overload their sensors. I wonder how much it will take to completely fry them.







  • You won’t be able to contribute to a project on any of those instances, unless you register on it. So if you are a prolific contributor, you might end up signing up on dozens of those instances.

    Forgefed is a federation protocol for such instances. It’s based on ActivityPub - the same that powers Lemmy and Mastodon. You can have just one account on a single instance and still be able to contribute to projects on multiple others. It’s still in the works though. It’s expected that at least gitlab, gitea and forgejo will support it.