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Alternative History
Time traveller SHOCK claim: Allies won World War 2 with TIME MACHINE in London
submitted 5 years ago by Mnemonic from express.co.uk
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[–]wizzwizz4 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 0 fun3 insightful - 1 fun - 5 years ago (2 children)
No; all you'll need is a way of generating a closed time-like curve that encompasses regions of spacetime outside your light cone. As far as we know, that's physically impossible, but it might be possible if a certain part of our physics is proven wrong.
[–]Mnemonic[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - 5 years ago (1 child)
If you do that, you'll end up somewhere outside our solar system, It just makes sure you end up in the same space-time coordinates only a different 'time'. The earth moves, our solar system moves and the milky way moves.
And how fast is the Milky Way Galaxy moving? The speed turns out to be an astounding 1.3 million miles per hour (2.1 million km/hr)!
https://astrosociety.org/edu/publications/tnl/71/howfast.html
[–]wizzwizz4 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 0 fun3 insightful - 1 fun - 5 years ago (0 children)
There is no absolute reference frame. If you had a magical machine that created closed time-like curves long enough to encompass decades, you would:
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[–]wizzwizz4 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 0 fun3 insightful - 1 fun - (2 children)
[–]Mnemonic[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 0 fun2 insightful - 1 fun - (1 child)
[–]wizzwizz4 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 0 fun3 insightful - 1 fun - (0 children)