Assume there are no issues with causality.
Going into the past is impossible. You can travel into the future by abusing t= t'/√(1-v2/c2) time is passing more slowly for the person travelling at such a speed than it is for the observer.
So you need to build something that can transport a person as close to the speed of light as possible, and return them safely to where they started. The closer to the speed of light that you travel the shorter the trip and the further into the future you go.
Travelling at the speed of light for 50 years for example is not easy to accomplish. It'll seem like a very short amount of time has passed for you, but how are you going to safely move something for 50 years at that speed? And without killing them? You'd have to gradually reach that speed somewhere out in space, not hit any space debris, and return to earth.
What if the vessel could spin in place at a high speed?
Could it orbit the earth while corkscrew spinning at Mach 42069?
Even if that worked how in the heck would you survive it
Isnt this back to front. You'd want to go slower than everyone else?
So you just jump off earth and stop rotating on the axis and stop orbiting the sun. And when the earth came around again, you'd be in the future?
Or you could just take a nap.
The past doesn't exist. There's nothing to travel back to.
Only way to go back in time is to go faster than C.
Time may go backwards e.g. when the universe eventually starts to contract. But is that really the same as going back in time? More like repeating time, backwards.
You have more of a shot at having a super computer to create a 100% accurate simulation.
Or better still, creating somewhere in the present worth escaping to. Or in the future.
All you need to do to travel to the future is go to sleep.
Let's contribute to figuring out how to make it real.
It's not possible. If it were there would be documented cases of people visiting from the future.
I don't understand the question. If time travel were possible, where are the time travelers? What do you mean "how do you figure?"
Well said.
I don't believe the past exists.
It still exists in the present. Just a bit older.
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