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Siellus t1_j498mmv wrote

Reply to comment by skytomorrownow in Is time travel going to happen yes or no? by MixOk1458

Technically, yes.

Realistically, no.

Have one gigantic galaxy sized & perfectly calibrated refracted mirror 10 lightyears away perpetually focused on us at all times.

Point a gigantic planet sized telescope at it. done, you can now see Earth Live from 10 20 years ago.

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Willing_Definition71 t1_j499zwf wrote

If you looked at a mirror 10 light years away, you would see 20 years in the past

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Siellus t1_j49afp2 wrote

Derp, You're right - I meant 5 lightyears away (roughly near proxima centauri, but went with 5 rather than 4.2 because meh) and 10 for the whole journey back and forth.

But you're right, I'll change it! :)

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Willing_Definition71 t1_j4994vv wrote

I have heard similar ideas that if a time machine was created, that it would only be able to travel back to the point it was switched on

So since we have not invented it yet, nobody is travelling back this far

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