Feeling like taking a vacation.

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[–] 139 points 1 year ago
[–] 71 points 1 year ago (6 children)

You evaporate over billions of years via Hawking radiation.

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  • [–] 14 points 1 year ago* (last edited 1 year ago) (1 child)

    As if being shredded to atoms wasn't harsh enough, you don't even get keep your neutrons and electrons in this process. I guess it still counts as "exiting" the black hole, but just barely.

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  • [–] 40 points 1 year ago (3 children)

    Generally speaking, as Hawking Radiation.

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  • [–] 10 points 1 year ago (2 children)

    what if i want to use my legs afters

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  • [–] 37 points 1 year ago (1 child)

    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

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  • [–] 33 points 1 year ago (6 children)

    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.

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  • [–] 11 points 1 year ago (1 child)

    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.

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  • [–] 4 points 1 year ago (2 children)

    Does this also mean that black holes are totally indestructible?

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  • [–] 5 points 1 year 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.

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    [+] 22 points 1 year ago (7 children)
  • [–] 19 points 1 year ago* (4 children)

    With super massive black holes, you could pass the event horizon and not even know it. To you, everything would remain relatively (no pun intended) comfortable. You could live for a couple days, falling towards the singularity before the gravitational gradient becomes enough to rip you apart, thus ending your life.

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  • [–] 2 points 1 year ago* (3 children)

    Now I have a doubt. Could you have a stable orbit around the singularity but inside the event horizon? Or is the orbit speed above c?

    Maybe you could live a comfy life there.

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  • [–] 3 points 1 year ago* (last edited 1 year ago) (2 children)

    I would assume that anything that lies within the photon sphere could never have a stable orbit. The photon sphere is the point that light itself orbits the black hole and its 1.5x the radius of the blackhole itself. Anything closer to the singularity than this boundry is doomed to fall into the singularity as it would require faster than light speeds to maintain any stable orbit.

    I wonder if anything could actually cross the photon sphere at all without getting vaporized by potentially billions of years of accumulated light that got stuck orbiting the black hole.

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  • [–] 2 points 1 year ago

    Hell, forget the photon sphere, even. Know that jet of energy black holes are thought to sprew out at their poles due to the material falling in to them? Imagine what that material is doing inside the event horizon. Whatever it is, it'll be pretty violent, enough to call the moon slamming into the earth "relatively peaceful". It would probably be more pleasant hanging out in the core of the sun than even an AU away from a black hole's event horizon (and I mean on the outside).

    Also, the event horizon is where light cannot escape. The "spacecraft event horizon", or the orbital plane surrounding a black hole where a spacecraft couldn't escape it is going to be much farther out, unless we can figure out ftl travel.

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  • [–] 1 point 1 year ago*

    If I recall correctly, the photon sphere orbit is unstable, so there may not be a ton of photons there. "Unstable" in this sense means that photons in adjacent orbits tend to diverge away from the photon sphere orbit rather than toward it.

    For Schwarzchild holes, the lowest circular orbit for massive objects is at 3 event horizons, which is above the photon sphere. There are unstable circular orbits down to 2 horizons. Black hole rotation reduces this altitude for prograde orbits asymptotically down to 1 horizon.

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  • [–] 22 points 1 year ago (1 child)
    [–] 20 points 1 year ago (6 children)

    Space time gets so curved that literally every direction around you is the center of the black hole.

    You look forward? Black hole center.

    Behind you? Center

    Up down? You guessed it

    From your perspective, the center literally is the only direction you can go, deeper.

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  • [–] 17 points 1 year ago

    Have 5D future humans put you in the tesseract, then you exit seeing your daughter on their deathbed while you barely aged a day.

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  • [–] 16 points 1 year ago (1 child)

    don't fight against gravity by trying to fly directly towards the universe. Instead, fly parallel to the universe until you are out of the black hole's pull, then angle back towards the universe.

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  • [–] 14 points 1 year ago* (4 children)
  • [+] 7 points 1 year ago (2 children)
  • [–] 9 points 1 year ago

    You'll be slowly radiated out one half of an entangled pair of particles at a time. Arranging for reconstruction might prove difficult.

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  • [–] 9 points 1 year ago

    with a stronger blackhole next to your blackhole. just have a stronger pull.

    its like how do u have bribed politicians not vote according to that bribe: bribe them with a bigger bribe.

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  • [–] 7 points 1 year ago (1 child)
  • [–] 7 points 1 year ago
    [–] 7 points 1 year ago (6 children)

    Are you capable of moving faster than the speed of light?

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  • [–] 2 points 1 year ago (2 children)

    Pretty sure even that wouldn't work? Once inside all directions become further in, or all futures become further in, or some bullshit like that.

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  • [–] 13 points 1 year ago (1 child)
  • [–] 6 points 1 year ago

    As a jet of energy, assuming you haven’t actually crossed the event horizon

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  • [–] 6 points 1 year ago

    feed it taco bell

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  • [–] 10 points 1 year ago (1 child)
  • [–] 5 points 1 year ago (3 children)

    With the assumption that we are alright in there, wait until it evaporates naturally. I hope you brought a lot of books, cause depending on its mass, it can take some time.

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  • [–] 2 points 1 year ago* (1 child)

    Actually, it may be that it quite literally can't take any time inside a singularity! As you approach a singularity, the spacetime curve representing the passage of time approaches zero, meaning that from your perspective, the universe outside the event horizon moves more and more impossibly fast, and from an outside perspective, you move more and more slowly until your motion appears to stop entirely.

    At the singularity, our understanding of spacetime basically just shrugs in an infinite manner, puts on its hat, and clocks out for the day. It may be that, for the singularity, the entirety of time between the collapse of the star that formed the black hole and the eventual evaporation of the black hole due to Hawking radiation are compressed into a single instant, and no time at all passes for it.

    So you might not need any books at all, because by the time you reach the singularity (which wouldn't take a particularly long subjective time), it may well be the end of the universe. Hope you paid the meter.

    (Edit to add: Now, probably not. Hawking radiation has to come from somewhere, meaning the particles that have been absorbed had to be converted into them at some point, and that can't happen if those particles are also still matter (or whatever) in an eternal conga line at the singularity. But hey, our understanding of physics literally can't be confirmed or denied inside of a black hole, so your fanfic is as good as anyone's!)

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  • [–] 5 points 1 year ago

    That's the fun part, you don't.

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  • [–] 22 points 1 year ago (11 children)

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

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  • [–] 8 points 1 year ago (8 children)

    Do they do that? Is that what the Big Bang was?

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  • [–] 12 points 1 year ago (6 children)

    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=mc^2^).

    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.

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  • [–] 4 points 1 year ago (5 children)

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

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  • [–] 5 points 1 year ago (2 children)

    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.

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  • [–] 2 points 1 year ago (1 child)

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

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  • [–] 4 points 1 year 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.

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  • [–] 4 points 1 year ago

    You go into a white hole, duh

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  • [–] 4 points 1 year ago
    [–] 3 points 1 year ago

    same as you would anybody's hole: just pull out.

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  • [–] 3 points 1 year ago (1 child)

    The singularity will pull you in, feet first, then the tidal effect will spaghettify you. You will be ripped apart atom by atom by those same tidal forces. You cannot escape the event horizon.

    Good luck!

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  • [–] 2 points 1 year ago

    Find the Myotrope, invert your orthocameral orbit, grab your ankles, and hold on!

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  • [–] 2 points 1 year ago (1 child)

    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.

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  • [–] 1 point 1 year ago

    Spaghettified... Mostly.

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  • [–] 1 point 1 year ago

    You just pop out the white hole on the other end.

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  • [–] 1 point 1 year ago

    you just walk out. might need to build a bridge first

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  • [–] 1 point 1 year ago

    You throw a big party in a place as far as your eyes can see. You call it the event horizon.

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  • [–] 1 point 1 year ago*

    I don't know about exiting but I like Entering A Black Hole Backwards followed by Chilly Water.

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  • [–] 1 point 1 year ago