Comment on Nope, not visiting that

protist@mander.xyz ⁨6⁩ ⁨hours⁩ ago

• Quetzalcutlass@lemmy.world ⁨6⁩ ⁨hours⁩ ago

  There’s no universal frame of reference. Any theoretical time travel would likely need a beacon of some sort to calibrate their arrival point, meaning you could only travel back to the point time travel was established.

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  • givesomefucks@lemmy.world ⁨5⁩ ⁨hours⁩ ago

    You know what they say: the best time to build a time machine is 50 years ago.

    I think that’s basically the movie Primer too, they’d turn the machine on, go hide in an apartment for X amount of time, then go back to the machine and emerge 5 minutes after they turned it on and just walked away.

    But gravity effects time, sticking close to a planet isn’t going to be hard.

    Ironically enough the first (if we ever get them) time machines are going to be a hell of a lot like modern “UFOs” are described. You couldn’t risk landing on the planet, elevation changes are what’s really a nightmare to account for. Show up and hour early and everything is a foot higher because of how fast we’re spinning.

    So you’d want a space craft, because space is big and empty. And realistically it’s going to take something bigger than a telephone booth or even the 1980s embodiment of Florida on four wheels with a hood designed to do cocaine off of to house a time machine.

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    • marcos@lemmy.world ⁨4⁩ ⁨hours⁩ ago

      Show up and hour early and everything is a foot higher because of how fast we’re spinning.

      Any actual process for doing it would probably be continuous in some way. Even if it’s just the machine making that part of the trip. Just living existence at some time and arriving at a different one doesn’t make a lot of sense.

      So, just more reason to do it in space.

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      • TeamAssimilation@infosec.pub ⁨2⁩ ⁨hours⁩ ago

        Imagine your time machine has spiders at the time of your arrival, because it had a small defect that grew into an opening after several years.

        “Ha ha, I can’t see anything, but it seems like time travel tickles”

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    • HeyThisIsntTheYMCA@lemmy.world ⁨3⁩ ⁨hours⁩ ago

      If time travel existed, it would be invented at all time periods simultaneously

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  • mmmm@sopuli.xyz ⁨6⁩ ⁨hours⁩ ago

    Damn physic laws removing the fun from physics

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    • MalReynolds@slrpnk.net ⁨4⁩ ⁨hours⁩ ago

      Don’t get me started on the second law of thermogoddamics (I’ll never stop :).

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      • UniversalBasicJustice@lemmy.dbzer0.com ⁨35⁩ ⁨minutes⁩ ago

        So if I was going to correct you by referencing the thermodynamic law that forbids “never stopping” but upon further inspection determined that was the joke in the first place, does that mean I have created an example of the zeroth law?

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  • edinbruh@feddit.it ⁨6⁩ ⁨hours⁩ ago

    Basically half the plot of quantum break

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• HeyThisIsntTheYMCA@lemmy.world ⁨3⁩ ⁨hours⁩ ago

  So a more intelligent place than here

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• phdepressed@sh.itjust.works ⁨5⁩ ⁨hours⁩ ago

  I’ve seen this take a lot it feels like and it boggles the mind why. If someone figures out time travel they ipso facto will have figured out the space travel as well.

  If you can travel through time you can travel through space.

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  • yakko@feddit.uk ⁨1⁩ ⁨hour⁩ ago

    Not enough people bust out ipso facto anymore.

    Also agree, but mostly chuffed on the phraseology.

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    • blackbrook@mander.xyz ⁨27⁩ ⁨minutes⁩ ago

      Does it count if you bust it out ex post facto?

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• Malgas@beehaw.org ⁨4⁩ ⁨hours⁩ ago

  That logic assumes that there is some universal way if measuring the position of the earth, but there is no absolute system for measuring position in space. Location, distance, velocity, and even simultaneity depend entirely on the choice of a frame of reference. And the frame in which the earth is stationary is no less valid than any other.

  Also the type of time machine has a bearing here. The traditional H.G. Wells vehicle-type doesn’t jump, but moves smoothlythrough all the intervening moments in time, so there’s no reason it wouldn’t stay firmly on the surface. And a time portal that forms a connection to the same apparatus at a different time would have no problem either, since the machine itself doesn’t move except in the ordinary way.

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  • ProbablyBaysean@lemmy.ca ⁨3⁩ ⁨hours⁩ ago

    If i had a vaccume and a carbon nanotube rotating such that the ends are moving at the speed of light, and another going the opposite direction, I would have a dimensional anchor as moving it would cause spacetime to exceed the speed limit.

    Voila, I just created a sci-fi plot device

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    • counterfactual@sopuli.xyz ⁨2⁩ ⁨hours⁩ ago

      Read The Billiard Ball by Asimov to understand why a gravitationally “locked” device would not work.

      You lose the frame of reference to the astral bodies around it, therefore it stays in place as the Earth and everything else simply move past it. Essentially useless as an anchor.

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• danc4498@lemmy.world ⁨5⁩ ⁨hours⁩ ago

  My theory is that time travel still follows the curve of the space time continuum.

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