Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[i2amroy]

Literally the only part of the universe that matters.

I'm not using literally in the figurative sense, either; there is absolutely no possible way for anything outside the observable universe to affect Earth. That's kinda the definition of the observable universe.

That said the observable is getting bigger at the rate of 1 light year per year.

And technically anything on the other side of a wormhole would be included in the observable universe, you'd just need to look through the wormhole.

[Putnam]

Literally the only part of the universe that matters.

I'm not using literally in the figurative sense, either; there is absolutely no possible way for anything outside the observable universe to affect Earth. That's kinda the definition of the observable universe.

That said the observable is getting bigger at the rate of 1 light year per year.

And technically anything on the other side of a wormhole would be included in the observable universe, you'd just need to look through the wormhole.

It's getting bigger faster than that...

Though not by much. It's about 1.000000103 light years per year.

Expansion of space and all that.

[hops]

I'm not sure about being able to transport mass past the speed of light. I think FTL information travel is definitely possible, though, but then again that's a meaningless statement since we achieved it already.

So far the only way for FTL that I can imagine is to destroy something and send its information to be rebuilt at the destination, which, again, is kind of pointless as FTL because you might as well make a dozen copies of the thing you want to send over.

[Putnam]

I think FTL information travel is definitely possible, though, but then again that's a meaningless statement since we achieved it already.

No it is not and no we have not.

[Sergarr]

There isn't anything FTL because light-speed already equals infinite speed from your point of view, if you're looking from the front of the object moving at light speed.

It also equals exactly half of light-speed if you're looking from behind the object moving at light speed.

Relativity is confusing.

[forsaken1111]

I think FTL information travel is definitely possible, though, but then again that's a meaningless statement since we achieved it already.

Gonna need a citation here... did we develop the ansible when I wasn't looking?

[forsaken1111]

I recall us managing to transfer information via quantum entanglement without having to send the information there post-rotation or whatever, but I know my brain, so that's probably something it made up.

Again... Citation Needed. I'm not finding anything in searches other than a few crackpot claims along the lines of free energy and a few about how you can live on nothing but air and sunlight, no food needed!

[Urist Arrhenius]

I recall us managing to transfer information via quantum entanglement without having to send the information there post-rotation or whatever, but I know my brain, so that's probably something it made up.

You're referencing a real thing, but it's not genuinely faster than light information travel. Two distant observers may make the observation simultaneously, but one could not send a determined piece of information to a distant observer faster than light.

[Osmosis Jones]

If we had achieved FTL information transfer, we'd know about it; that's a Nobel prize winning, Earth-shattering, causality rewriting ability.

No, as it stands, we still need to compare results to confirm entanglement had occurred.

[Cryxis, Prince of Doom]

Wouldn't FTL messages get to where you send them before you even sent it? or was that some stupid sifi thing that stuck in my head as true?

[Osmosis Jones]

Wouldn't FTL messages get to where you send them before you even sent it? or was that some stupid sifi thing that stuck in my head as true?

If they're in different inertial reference frames, yep. To use them as a time machine, all you would need is to shoot one off as fast as possible into space, and use it as a relay to bounce messages off.

[forsaken1111]

I remember a book where that was one of the primary plot elements. People on Earth in the future were using an untested technology to send messages to themselves in the past by beaming the message at the point in space where the earth would have been, or something to that effect. Warning themselves about an upcoming disaster so they might better prepare for it.

It got weird.

[Tylui]

To be clear, an FTL message that you send cannot return to you before you send it. And there isn't much preventing a new type of particle that can travel faster than light, but we haven't found one yet, and likely we won't. It would make the concept of simultaneity more complicated, but that wouldn't make it inconsistent or anything. https://www.youtube.com/watch?v=MNriGs9hL8M

[Osmosis Jones]

To be clear, an FTL message that you send cannot return to you before you send it.

Uh, only because a message is unable to change direction. If you have an ansible, and you have a relay moving relative to you with their own ansible, you can bounce messages back into your past.

[Cryxis, Prince of Doom]

So what exactly makes time?