• Atomic
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    7 months ago

    Is this a time machine or a star-trek space ship? This thing keeps changing

      • Atomic
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        7 months ago

        No, some are talking about how it needs to detect gravitation from other planets.

        That has nothing to do with a time machine working on earth.

        • Knock_Knock_Lemmy_In@lemmy.world
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          7 months ago

          The time machine would use gravity so it can arrive at the same relative position in a different time. But that only gets you on the planet, not the same position on the planet.

          How would rotational movement be accounted for in a generic way?

          • Atomic
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            7 months ago

            How would rotational movement be accounted for in a generic way?

            I don’t know how it would be accounted for in your imagine time-machine. Because they don’t exist.

            What I do know. Is that you don’t need gravity to “detect” earths rotational speed. Because we already know what it is.

              • Atomic
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                7 months ago

                And is there a reason you couldn’t program that data into the machine?

                Doesn’t that sound like something you’d need? Along with a mathematical model of how earth orbits the sun?

                • Knock_Knock_Lemmy_In@lemmy.world
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                  7 months ago

                  If the machine has the ability to jump in time and space (needed to land in the same spot) then it would be a real waste to use it only on earth.

                  So we would need a mathematical model of the entire universe that is accurate to the metre over all time. This N body is much harder than the 3 body problem.

                  Or we use gravity and other methods to track relative stationary position.

                  So, what other methods can be used to determine rotation?

                  • Atomic
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                    7 months ago

                    Jesus fucking Christ. We can still calculate the rotation of a body like we normally do.

                    You observe it. Wait 1 seconds. Observe it again. And the delta in position is your rotational speed per second.

                    That is the method. The only one