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Message: <blockquote data-quote="Umbran" data-source="post: 6636847" data-attributes="member: 177">Okay, let me try to address some points....Popovers are not instantaneous.  I mean, you need tie to make the batter, and then the things have to bake...But seriously...I don't think there's a "most likely" here.  As far as I am aware, there's no particular theoretical constrain on how long the trip through the trip through the wormhole is.  I would presume that, should the engineering allow it, folks would make wormholes with very short paths, but maybe that's not possible.Yes, they are a solution to an equation, and none have ever been observed.  There is, to date, no practical way to create or travel though such a thing.  But, as for theoretical ways, yes, there are ways that work, in theory.Einsteinian relativity allows for space to be shaped such that it has a "shortcut" through it.  The problem is that all such solutions are not stable to small perturbations - which means that even small changes in gravitational fields in or near the wormhole tend to collapse it.  However, Kip Thorne and others have come up with various ways to stabilize wormholes against these small perturbations.  They all require application of materials or energies with unusual properties that, again do not seem to be prohibited by the Universe, but we have never observed in nature or made ourselves in anything like large enough quantities.  These are usually lumped under the term "exotic materials".  There are a few solutions I've seen that suggest that quantum effects could also be used - but since we don't have a good marriage between quantum mechanics and gravitational effects, that's very speculative.Which amounts to there being ways in theory.  Which makes sense, as wormholes have not been observed, so they only exist in theory anyway <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile    :)"  data-smilie="1"data-shortname=":)" />Well, yes and no.  When you look at a wormhole, you aren't looking at a *thing*.  The wormhole is a path through space.  So, like when you look through a doorway, you'll see whatever is on the other side of the door.  If both ends of the wormhole are in basically open space, this won't look like much, no.  But, if one is in New York City's Central Park, and the other end is in the Sahara Desert, you're looking trough a door into a radically different environment.Someone actually did an image rendering, taking the curvature of space involved, for one type of wormhole.  It looks like this:[ATTACH]68783[/ATTACH](this is "Wurmloch" by CorvinZahn - Gallery of Space Time Travel (self-made, panorama of the dunes: Philippe E. Hurbain). Licensed under CC BY-SA 2.5 via Wikimedia Commons )There are other, slightly different solutions for what we'd call a wormhole, that have somewhat different appearances to our eyes.  But I think it is this type that was used in "Interstellar".  I am not sure this is correct.  The actual path through the wormhole is pretty much normal, flat space. The wormhole has an odd appearance, but there is no singularity, and so no ever-increasing curvature of spacetime that creates time dilation as you see around a black hole.  Now, if one end of the wormhole is *moving*, relative to the other end, then funny things can happen.  Since it is a deformation of spacetime, it can be moving in space and/or in time...</blockquote>

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