• LillyPip@lemmy.ca
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    2 days ago

    This assumes time remains constant, though, right? But isn’t time affected by the black hole?

    • DomeGuy@lemmy.world
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      2 days ago

      Time dilation is your subjective acceleration veering into more “time” than “space”.

      If you somehow were in a flat universe with parallel velocity to an object several light-years away, and somehow managed to accelerate towards it at 1 g, you’d impact at the time on your watch that pure Newtonian physics says you would.

      The subjective clocks of the place you’re hitting would measure your travel time as a lot longer, however. But it wouldnt be infinite at all – a relatively small multiple of “several” years, in fact.

      (Before the relativistic impact recused both you and them to an energetic plasma, that is.)

      • A_A@lemmy.world
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        2 days ago

        We have a physicist here ! Thanks to the universe 😁
        (i am more like a physics’ enthusiast who understood A. Einstein(s’) very old book on special (= 1st draft) relativity)

        • DomeGuy@lemmy.world
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          2 days ago

          Not a physicist – they know the math.

          Just a sci-fi enthusiast who got really annoyed by a trilogy that didn’t understand what the “delta” in “delta-v” meant and so the space ships spent a lot of time getting to a very high orbital speed before each fight.

      • LillyPip@lemmy.ca
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        2 days ago

        So there are two correct but very different answers to this question, then, right? One for an outside observer and another from the perspective of the black hole?

        • bufalo1973@piefed.social
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          2 days ago

          The extreme case is a photon crossing the universe. For an outside observer, it will take the photon billions of years to cross the universe. For the photon there is no time at all.