Neil deGrasse Tyson - Can We Go Back in Time Using a SpaceTime Machine?

Neil deGrasse Tyson - Can We Go Back in Time Using a SpaceTime Machine?

Astrophysicist Neil deGrasse Tyson explains the details behind backwards time travel. When we were kids we wondered whether we can travel into the future or go back in time using some sort of time machine.

Neil deGrasse Tyson also explains how and why we know we can travel into the future. Special and general relativity, suggest that suitable geometries of spacetime or specific types of motion in space might allow time travel not only into the future but also into the past.

Perhaps the best way to go back in time is to make use of traversable wormholes. Neil Tyson explains all the intricacies of going backwards in time using a wormhole

Another exciting approach for backwards time travel, involves a dense spinning cylinder usually referred to as a Tipler cylinder.

#science #timetravel #neiltyson

[P-Star]

"I want to go back in time. Not to change anything, but to feel something again.”

[crowcypher]

As a kid I wanted to go back in time to see a dinosaur. Now I wanted to go back in 2020 to appreciate, and save someone. I would do anything to bring him back. I just wanted to see him even one last time.

[JimmyG]

On the bright side, at least we can go back in time in a way through YouTube, music, movies, and art

[GHOST-rgkl]

I desperately wanna go back to January 2019 to enjoy my good times again. I really wish we can refresh time and enjoy life again.

[leestewart]

If going back in time is possible, then that means the past still exists. If the past still exists, then that means we are functionally immortal. We exist within our frame of reference ( our lifetime) and we always will.

[deepaktripathi]

I desperately want to go back in time.

[BuscandoTesoros]

Neil explains in a way that anyone can understand 🙌🏽

[DeesonJame]

Awesome. I understood nothing from this video.

[Firstname-vvcs]

Blows my mind how our interpretation of the universe mathematically makes us right in solving and making calculations on hypothesis

[thehound]

Time travel is such an interesting topic

[KeithCopeland]

This is fascinating!!! Time travel has always been the most interesting scientific possibility for me!!!

[vgegoon]

When I want to go back in time, I watch old black & white 1930's movies.
They're a way to look into the past, way before I was born.

[pfridell]

I love to listen to Neil explain stuff. Most of the time it's a struggle just to keep up but every now and then a light goes on in my brain (which doesn't have any of this higher knowledge in it) and I actually understand and see what he's saying.

[emansfvera]

Time isn’t linear, humans just perceive it like that because we are born, live and die creating a past, present and future but time and space are one it exists all at once.

[Breacher]

I would like to go back in time 35 years and warn myself to stay single, never marry.

[_damian__]

it’s super sad and corny that i even searched this up, but rn i’m at a moment in my life where tbh i need this. last summer i was the happiest i had ever been, and its been killing me that i took that time for granted. there were people and different aspects of life during that specific summer that made me just extremely happy, but now i feel as if i can’t get that feeling back again. friends tell me “oh yeah it was just your ex” but if anything she’s just an aspect of that. life isn’t the worst right now and i’m happy that i met people on the journey to where i am right now, im just not as happy as i was back then, and i can’t stress how happy i was. i hope someone can relate to this because honestly i haven’t put this much thought into a comment ina while lmao. TL;DR, i searched up how to time travel stupidly because i miss a period of my life from the past.

[somersetcace]

I think the paradox would be dealt with, IF each movement back in space-time then created a whole new branch of space-time at that point. So, you go back to 1900 and from that point there becomes now two divergent space-time branches. The original branch then remains unchanged because your self is no longer on that branch after whatever point you leave. Each time you move forward or backwards a new branch is created, meaning you keep moving `forward` in a relative sense through each new branch you create, regardless of where it is on the timeline. In that case, you could kill your parents before they had you and avoid a paradox, because `you` weren't born on the space-time branch you killed them on and *that* space-time branch still exists unchanged to the point you left it. There's not a shred of scientific evidence to support that idea though, so it's kind of just mental fluff. What would it take to overcome that paradox?

[seanmurphy]

I always assumed that if you managed to go back in time, you'd probably be in a separate reality, not the original one you were from. Basically a branched reality where things and events transpire differently. That would explain the grandfather paradox.

[jessykaiser]

Neil is one of my favorite people in the world! I think that if everyone would listen to him, instead of what's "self-destructive" in the world, we would have a chance at world harmony. He brings harmony into the world with his knowledge and character.

[masterexploder]

Remember ppl! Going back to the past to change something doesnt fix the future. You create another timeline and that timeline becomes your future.