I'm not sure if this is the researchers' issue or is an issue with the scientific press, but it would help if the "discoveries" theorists made with their hitherto unestablished and untested theories like various string and QG based theories were not touted as discoveries about the real world.
Travel through wormholes is possible, but slow
71–80 of 190 posts
Re: Travel through wormholes is possible, but slow
#72Earlier quoted context omitted.
There is only one direction through the event horizon of a black hole.
I thought Hawking radiation was going the other direction, but that it doesn't carry information about the original mass/energy. Is that right?
I don't think there's a definitive answer there, nor any reason to believe Hawking radiation is produced inside an event horizon, rather than just outside it. The event horizon is pretty much defined by the boundary that radiation will not escape across, so I wouldn't assume Hawking radiation behaves any differently with respect to it.
Re: Travel through wormholes is possible, but slow
#73Earlier quoted context omitted.
Without negative matter, it's impossible to build a wormhole that's shorter than the distance through normal space. This piece of math shows that it may still be possible to build a wormhole which isn't shorter than that distance. Obviously that wouldn't be much of a shortcut, but the potential research and (maybe) real-world applications are still impressive.
That’s not what I was asking. I was asking about the particular usage of the average null energy condition as justification to rule out wormholes: why isn’t that just begging the question by assuming your conclusion? and how does that particular assumption actually lead to the conclusion there can’t be wormholes? It’s interesting the downvotes for asking someone to support a scientific claim, and be clear where they’…
If that condition didn’t hold, we would expect to see a lot of phenomena that we don’t see, which makes it a poor model for reality.
Re: Travel through wormholes is possible, but slow
#74Earlier quoted context omitted.
Every space launch and every large object in orbit are trivially observable. Even when the NRO launches top secret spy satellites that they barely acknowledge the existence of, we know exactly when the launch is. Thanks to the cold-war risk of nuclear ICBMs, every launch is publicly announced to reduce the risk of false positives in an early warning system. In light of this, your proposition is impossible without als…
unnecessary. visual cloaking. are you watching objects in 5th gen FLIR? zero radar cross section. even USAF has acknowledged craft you can't trivially observe. your point is rubbish.
You seem to be assigning the capabilities of stealth aircraft to space launches. The energies involved are radically different. There is absolutely no evidence whatsoever that anyone has anything even approaching the technology needed to conduct an undetectable orbital launch. Again, I'd refer to the well-publicized launches of top secret NRO payloads. If the US government could launch those payloads without telling anyone, wouldn't they do it?
You've officially gone from leaning over the ledge to taking a flying leap into crazy land in my book.
Re: Travel through wormholes is possible, but slow
#75When ever I think of traveling through a wormhole/blackhole, I imagine you would be squished and crushed and come out the other end as pure vaporized energy. This makes me wonder, if there is the potential for our beings (or things) be able to be vaporized and then recreated to original form. If we are just mass and particles, this should be possible?
Uncertainty principle says...probably not. It's impossible to make a complete copy of the pattern.
Even aside from that -- it's unlikely to be practical to scan something down to the smallest level level of matter, because the tools we use to manipulate things can't manipulate things smaller than their own finest details. So there's a "glass wall" in that you can only replicate things less finely detailed than the replicator. That works fine for macroscopic things (that's why you can buy a 3D printer today), but is implausible for things that we believe to be as finely detailed as our machines.
Re: Travel through wormholes is possible, but slow
#76Earlier quoted context omitted.
The Average Null Energy Condition (ANEC) makes it so there can not be a traversable wormhole joining two otherwise disconnected regions of spacetime. So by construction, any infinite null geodesic (a light ray) which makes it through the wormhole must be chronal (causally connected). This means there can be no traveling faster than light over long distances by going through one.
So that's it, then? Some thing, say, a million light years away from another thing is in practice entirely inaccessible to civilizations existing on that other thing, requiring a minimum of a million years to reach?
Well, theoretically they could load their civilization up on a giant ship and move their civilization there over the course of a million years. Likelihood of success? Probably not great, but possible.
Re: Travel through wormholes is possible, but slow
#77Re: Travel through wormholes is possible, but slow
#78When ever I think of traveling through a wormhole/blackhole, I imagine you would be squished and crushed and come out the other end as pure vaporized energy. This makes me wonder, if there is the potential for our beings (or things) be able to be vaporized and then recreated to original form. If we are just mass and particles, this should be possible?
You've just described a Stargate from the SG1 universe :)
Gates disintegrate objects that pass their event horizon, transmit the energy and "pattern" of the object to the exit gate which rebuilds them.
Essentially everyone in that universe that has stepped through a Stargate has "died" and it's their copies currently walking around.
Re: Travel through wormholes is possible, but slow
#79Earlier quoted context omitted.
Its all about information. The order of atoms to make a person is information. No information passes thru the event horizon of a black hole. So, no.
> No information passes thru the event horizon of a black hole. that is only true in one direction though, right?
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Re: Travel through wormholes is possible, but slow
#80When ever I think of traveling through a wormhole/blackhole, I imagine you would be squished and crushed and come out the other end as pure vaporized energy. This makes me wonder, if there is the potential for our beings (or things) be able to be vaporized and then recreated to original form. If we are just mass and particles, this should be possible?
Its all about information. The order of atoms to make a person is information. No information passes thru the event horizon of a black hole. So, no.
> No information passes thru the event horizon of a black hole.
No information is lost. A copy of it can very well fall into the BH (and it does).