Feeling like taking a vacation.

  • vane@lemmy.world
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    7 days ago

    With space time snapshot machine I guess, you setup space time snapshot machine to take snapshot and setup detector on your body particles to roll you back from snapshot after your every particle is altered and it rolls you back to previous state. I think this should work.

  • dogs0n@sh.itjust.works
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    8 days ago

    When you’re ready, you should see a bookshelf. Start messing with the books to send a message to your daughter and maybe she will help you.

    Prerequisites: daughter

  • JPSound@lemmy.world
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    8 days ago

    Literally, impossible. To exit the event horizon of a black hole, you’d have to travel faster than the speed of light. We know for a fact that anything with mass cannot travel at the speed of light. (And anything without mass MUST travel at the speed of light) Once you cross the event horizon, you’ve been entirely and irreversibly separated from the rest of the universe.

    • WoodScientist@sh.itjust.works
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      8 days ago

      It’s not even about needing to exceed the speed of light. Once you cross the event horizon, spacetime around you is so warped that “out” doesn’t exist anymore. Point your ship in any direction and fire up your FTL engine; it doesn’t matter. No matter which way you try and fly your ship, you’ll be getting closer to the center. Once you cross the event horizon, there is literally no way out.

      • JPSound@lemmy.world
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        8 days ago

        I love how mind bending it is imagining what lies inside a black hole. Everything we know about physics may essentially go right out the window beyond the event horizon.

      • JPSound@lemmy.world
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        8 days ago

        Well, there’s the hypothesis of a “naked singularity” whereas if enough charge or spin could be added to a black hole, the event horizon, aka, the black part of a black hole, could just vanish. This would expose the singularity at its center but its just a hypothesis. Or better yet, a thought experiment at best. This wouldn’t eliminate its mass though.

  • db2@lemmy.world
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    8 days ago

    You wait for it to reach a critical mass and explode. Might take a little while.

        • Lumidaub@feddit.org
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          8 days ago

          That’s a hypothesis though, right? They haven’t detected any yet afaik (which the article could make clearer in its introduction).

          • remon@ani.social
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            8 days ago

            Yeah, it mentions it at the end under the “Experimental observation” section.

            • Lumidaub@feddit.org
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              8 days ago

              Yes, I know, but realistically, many (most?) people just want brief, general information, which is what the introductory paragraph is for, no? So I’d argue it should say “hypothesised” or “predicted” somewhere in the, ideally, first sentence.

              • remon@ani.social
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                8 days ago

                It does say that it is a “model” and “predicted” in the first paragraph.

                • Lumidaub@feddit.org
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                  8 days ago

                  Okay, might have worded that better. It says “The radiation was not predicted by previous models” and “is predicted to be extremely faint”, not “it is predicted to exist” - and also “[it] is many orders of magnitude below […]” which sounds like a statement of fact. I realise this may be nitpicky but I don’t know if people who don’t know anything about the subject would interpret that as “we don’t really know if it even exists yet”.

      • timroerstroem@feddit.dk
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        8 days ago

        More or less. In my layman’s understanding: Black holes ‘evaporate’ slowly through Hawking radiation, losing mass as a function of their surface area (simplistically, particle/anti-particle pairs ‘pop out of nothing’ near the event horizon, one gets swallowed up the other escapes, this means a net loss of energy, which has to ‘paid’ by the black hole losing mass, think E=mc2).

        Since a black hole behaves (geometrically) like any other sphere, the proportion of its area to its volume will grow as the black hole loses mass (i.e. it will have more and more relative area the smaller it gets), this process speeds up over time thus ending in what I guess you could call an explosion (more a whimper than a bang, to borrow a phrase).

        Part 2 of your question: We don’t know.

        • meco03211@lemmy.world
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          8 days ago

          Wouldn’t the hawking radiation need to be a higher rate than the black hole is absorbing matter?

          • remon@ani.social
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            8 days ago

            Yes, the effect is extremely tiny and easily offset when a black hole is “feeding”.

          • Rikudou_Sage@lemmings.world
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            8 days ago

            Which will eventually happen to all black holes because the last things remaining will be black holes, so there would be no matter to absorb.

            • meco03211@lemmy.world
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              8 days ago

              Which begs the question, what happens to the estranged particle that escapes the black hole from hawking radiation.

              • Rikudou_Sage@lemmings.world
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                8 days ago

                They’ll wander forever through an ever expanding space, meaning they probably won’t ever come across a different particle.

                Eventually everything will reach equilibrium, aka the state where nothing moves anymore because everything it could react with is too far away to cause any reaction.