yep,
I heard that if you can travel fast enough, you can basically travel back in time. because you'll essentially be able to catch up to older light rays which reflected off of things from earlier periods in time. Because light basically travels forever, so somewhere out there someone far enough away
(assuming they had a powerful enough telescope), could be seeing earth right now as it appeared during the stone age. you would just need the ability to travel faster than light, and suddenly time is no longer tangible in the same way we see it now,
Doesn’t seem like it would work out the way we’d think. Light =/= Time.
If the sun exploded now (now being relational to time) we wouldn’t see it until eight minutes later. Still doesn’t negate the fact that the sun exploded even though we did not see it.
The most we could ever do is get closer to the speed of light. But light has no mass. And the faster an object travels, the heavier it gets. So it’s sort of an impossible feat for an object to get to the “no mass” state of light.
Hypothetically, if we were to achieve a state of no mass, and in 2022, we travel to a star that is 35 million light years away, we would only be catching up to the light that we would see on Earth in 2022. So, in essence, it’s present state in time, even though it would be 35 million years into the future back on Earth. And that’s if we get there and the star is there. The star could’ve died and we just haven’t observed it from Earth yet.
In an hypothetical scenario where we could exceed a no mass state or be sub-mass, it would seem that it would take us more into the future. But not the past. Going back in time doesn’t seem possible.