this post was submitted on 26 Sep 2026
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No Stupid Questions
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Interstellar is just a movie, mate. There is no such planet, time passes at the same rate everywhere - ie the caesium standard.
Time dilation is a thing, but as far as I'm aware it's not possible to travel someplace, pass any greater amount of time, and then return as though less time had passed - that's time travel. It's theoretically impossible, at least with current technology and understanding of relativity. Great movie though.
Edit: downvote if you don't understand that time dilation isn't magic, and you can't travel back through time.
As far as we know, traveling through time backwards is impossible.
Traveling through time forwards is very much possible though - in fact we are doing exactly that right now!
I explicitly said 'return back as though less time had passed' - i.e. backwards time travel - was theoretically impossible.
I never claimed travel forward though time was not.
It's not about returning back in time - it's just one place would travel forward slower than another place.
You're telling me what I was talking about? Returning back in time is exactly the comment I was responding to.
This goal is impossible for the reasons I explained.
You need to work on reading comprehension.
The concept being brought up is that we could compress years or centuries of research into a small time frame and 'bring it back' to our world, not go back in time. Obviously nonsense, but not actually physically impossible.
Yep how do you bring back the advancement chief?
Travel? Cool, by the time it arrives, the exact same amount of time will have passed locally as remote. The 100 years of advancement will arrive after your local advancement + travel time. So it will already be out of date. Useless.
You'd have to use faster than light travel, or communication - eg by quantum entanglement over a distance ten million orders of magnitude greater than we've ever witnessed it. Woah, did someone say that this is fundamentally impossible with our current understanding and technology? Yes, they did. Reading is fun.
I didn’t get the idea from the movie, I’m talking about how time passes differently depending on the pull of gravity; and that’s why I kind of alluded to this being theoretical at best. I don’t actually think it’s feasible to find an enormous planet just to have time pass more quickly.
Yep, and as I said, the return trip with all the rapidly evolved super-geniuses would be the impossible part of the plan.
You can't travel someplace else - experience say 100 years, and then travel back to your place of departure and have had only 20 years passed. That's fundamentally impossible.
Have had only 20 years pass in the local frame of reference, not the frame of the evolved super geniuses. Thus everybody on earth gets to enjoy the benefits, if there are any.
The problem is that your return to Earth would slowly move you back down the dilation losing the gains.
You can take two routes to a restaurant. One is very short but curvy and has a slow speed limit. The other is a really long straight shot with high speed. You can think of your scenario as such a case where even though the straight path is longer, it takes the same "time" to get to the restaurant.
You would be taking the faster, longer route while Earth takes the windy slow route but as you arrived back you would still be in sync.
Edit to add: Spacetime is a single thing which is why the above behavior the case.
That's not how time dilation works. Astronauts that have spent significant time on the ISS have experienced — however marginally — less time than their identical twins on Earth.