When you put a pole between the portals, and then weld its top end to its ass end, has it then become infinitely long?<br><br>Movement of the planet is not an issue with teleportation if the teleportation occurs instantaneously. Momentum however, that's a bigger problem. Speedy thing goes in, speedy thing comes out. If you teleport to the far side of a planet along its orbital path, you'll either be flung into the sky, or smashed into the ground. You're going to need some sort of inertia dampener...<br><br>Another problem is what's there at the target location and what happens to anything that's there? The only real solution is a bubble around you that displaces an identical bubble at the target location. You can't rely on your molecules replacing any molecules at the target site. First of all, because molecules can merge together very well, because they're almost entirely empty space. Secondly, if that somehow magically wasn't a problem, existing matter could still merge with air pockets in your body. Not too good for your health, normally.<br><br>What happens to YOU when you teleport? Does your "old" body die when a new one is constructed, but you're unaware because the two are simply identical?<br><br>And at which level does teleportation need to happen? Does it simply need to replicate every single molecule, as if taken from a magical pool of molecules and rebuild your body from that? Or do properties of molecules and atoms need to replicated as well? Properties like temperature, charge, alignment. And quantum properties like the spin of electrons, or their location in the swarm around the nucleus? Because that, my friends, cannot be replicated ever, due to their intrinsic uncertainty.<br><br>That's all I can think of, for now.,(reply>), If you weld it's top end to it's ass, what you kind of have is a torus of metal I guess.