Aside from the smart-ass replies, which detract from the discussion unless you came to this site for poor quality humour, many responders assume that, given enough time, earthlings will discover how to do science fiction. The three main items would be faster-than-light travel (ftl), suspended animation (stasis if you like) and anti-gravity.
Even as a Scientist/Engineer I can see no reason to assume that this science will eventually be discovered and therefore that ftl travel even exists as a possibility. Even light speed, or near it, is not possible with known science let alone ftl travel. Without ftl travel the universe is essentially mostly closed to us. Just wanting ftl travel to be so, does not make it eventually possible. Dream on.
Sure, near light speed is at least theoretically possible, if you have enough thrust for long enough, but nothing we have discovered, not even the ultimate, matter/antimatter reaction, can provide enough energy for near light speed travel. Converting energy to thrust is not easy either and the only known way of providing thrust is to fling out matter, "for every reaction" etc. . Ions are matter too. We can not carry enough mass for that, even if we had unlimited energy, since it then requires unlimited thrust-mass.
I would love that we could do the Star Trek thing, but even with massive telescopes we can not examine the universe or even our near galaxy closely enough to determine which planets, might be life sustaining. I'm afraid we are stuck here, but don't stop trying. If the flying saucers really are here, then maybe that gives us enough evidence to think that the physics exists to visit other star systems.