posted on May, 27 2011 @ 09:35 PM
I wouldn't rule out either. A lot of the things that would make time travel possible are also needed to make interstellar travel (within reason)
possible. And vice-versa. If you have the means to produce some distortion in time to traverse across eras, then by proxy you'd also have the means
to produce distortion in space to traverse across worlds. Space-time is connected in some weird way. They're also tied to the phenomena relating to
inertia and gravitation, but it's not exactly easy to explain. Einstein gets the closest to it, but even he may have had some mental blocks when the
threshold is pushed far enough.
It would require something like a "gravitational diode" effect or anti-gravity to distort the flow of time enough while also producing a traversable
event horizon. If you can do that, space travel becomes easy too. It's just some differences in how the same technology would be applied. (One way
might get figured out sooner than the other, but once you have it...)
If one is possible, then they both are. If temporal aliens can visit, then within reason - space aliens also have equivalent means available to them.