• 1 Post
  • 17 Comments
Joined 8 months ago
cake
Cake day: July 25th, 2024

help-circle








  • It is worthwhile to note that the above is highly reductive. A “black hole” is the sort of “hole” in spacetime you’re thinking of. It is caused, however, by gravitational dilation of spacetime by an incredibly high energy density. If you stuff enough matter and energy into a tiny enough space, the gravitational force will be strong enough that no other force in the universe can keep it from getting closer, and closer. Even the forces which keep neutrons and protons from combining with each other will be surmounted, as the energy density increases asymptotically toward infinity. This tiny point of effectively infinite density is the black hole’s “singularity”. Surrounding this singularity is a region where anything (matter, light, space itself) that gets within that range cannot escape. This is because objects have escape velocities based on their masses. If you’re going fast enough, you’ll fly away from the earth never to return. If you’re not going that fast, eventually you’ll fall back down. The further you are from the earth, the easier it is to escape it. The “black” part of the black hole, called the “event horizon”, is the distance from the singularity at which the black hole’s escape velocity is equal to the speed of light, meaning that, closer than that, nothing can escape it. Hence why it’s “black”, because no light is escaping from it. Technically, a black hole is not perfectly black due to hawking radiation, and a black hole with a 0.5 meter schwarzchild radius would probably be small enough to visibly glow (just a bit). (probably not, see below)











  • Welcome, sibling! I came over in the rush after the reddit API debacle. Some things I’ve learned in the last year:

    We may not have Sprog here yet, but get to know the environment, including colorful fauna such as:

    • Cephalopods that have Colonized the Skies.
    • The embodiment of the habitual movements of a space captain.
    • People that are kind-of like ossified remains.
    • People whose entire self identities revolve around draconic coitus (and all the controversy this brings).

    The vast majority of posts are made by, like, ten people, and I’m pretty sure they never sleep. I’m currently unconvinced that Flying Squid isn’t just a full colony of Humboldt Squid, constantly ramming into a giant submerged keyboard.

    As far as controversies: Avoid the “tankies”. You will find them on Hexbear, Lemmy.ml, and lemmygrad. They will not be going away, since the original creator of Lemmy is, apparently, one of them, and seems kind of mad with power. They treat with no man, and are willing to do anything to convince you that authoritarianism is good, as long as it calls itself “socialism”. One would think they would have learned their lesson from “National Socialism”… They apparently have not. Not everyone from those servers is a tankie, but most tankies are on those servers. Think of Tankies as the lemmy subspecies of those trolls you shouldn’t be feeding.

    Contribute to discussions! Especially on a place as small as Lemmy, lurking actively harms the community! Unlike most places, it’s generally fairly easy to figure out who’s being disingenuous and arguing in bad faith, and most people are very reasonable! (As long as you never say anything bad about Linux. Be forewarned. Do not engage unless your autonomic nervous system runs Arch)

    Welcome!