Comment on space
Knock_Knock_Lemmy_In@lemmy.world 2 months agoThe 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@sh.itjust.works 2 months ago
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.
Knock_Knock_Lemmy_In@lemmy.world 2 months ago
We know the rotational speed, but this time machine wouldn’t.
Atomic@sh.itjust.works 2 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 2 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?