Is time travel possible?

[thethinkertank]

Any ideas?

Edited June 17, 2019 by thethinkertank

[zapatos]

38 minutes ago, thethinkertank said:

Any ideas?

Yes.

[Curious layman]

Forward time travel definitely (time dialation), backwards I'd say impossible, but not 100% on that, I've heard arguments that say you can and you can't.

in practice though I'd say both are impossible due to the amount of energy required.

[zapatos]

What if we discover a new energy sources? For instance, how much energy is required to move in time 10 years? 

[Curious layman]

 

29 minutes ago, zapatos said:

What if we discover a new energy sources? For instance, how much energy is required to move in time 10 years? 

Are there any ideas what they could be? I thought that antimatter was the best there was?

[Curious layman]

4 hours ago, Curious layman said:

 

Are there any ideas what they could be? I thought that antimatter was the best there was?

Just occurred to me.... the new energy source would also have antimatter! Duh.

[thethinkertank]

Just now, Curious layman said:

Just occurred to me.... the new energy source would also have antimatter! Duh.

interesting you say that, but why antimatter?

[swansont]

5 hours ago, Curious layman said:

Are there any ideas what they could be? I thought that antimatter was the best there was?

Unless you can go and "mine" antimatter (e.g. positrons from a radioactive decay), it's not an energy source. It's more like a battery — energy storage. You have to put energy in to create it, and the ways we do that are really inefficient.

[Curious layman]

41 minutes ago, thethinkertank said:

interesting you say that, but why antimatter?

I thought that was the most potent thing we could use for propulsion, but thinking about it maybe a blackhole type engine, but is that even possible outside of Star Trek?

maybe something more exotic would be needed. Dark energy maybe.

[Art Man]

Question is, how much energy exactly is needed to time travel? What speed is necessary to reach a useful time dilation? Such as, if I wanted to travel 100 Earth years within 1 hour how fast would I need to go and how much space would I travel in that hour?

[ALine]

On 6/17/2019 at 12:39 AM, thethinkertank said:

Any ideas?

Sure, just stand still and look at a clock.