|A view of the Milky Way toward the|
constellation Sagittarius. Source: Wikipedia
At 26,000mph 0.000037% the speed of light, the trip would take 116,000 years. That's one-way. Our astronaut would be, long ago, fossilized. Time dilation is negligible here, so we don't need to factor it in at such low velocities. One of the nearest stars with a known planetary system is around 15 light-years. So, if we have cosmic relatives somewhere out there within that range, the chances of meeting up with them, are about, absolutely, nil. These distances and times involved are the reason most astronomers don't believe in UFO's, or, that we're being visited by extraterrestrials. YES, WE DO BELIEVE they exist but, not that we're being visited by them on any regular basis. The situation isn't much better with radio communications. Even though radio waves travel at the speed of light, a transmission to any hypothetical beings in, say, the Fomalhaut planetary system, will take 15 years. That's one-way. Telepathy, should it prove to be viable, would be much more economical, assuming it to be instantaneous. Another plausible answer might be, travel through wormholes, to beat the clock, but, for now, they're hypothetical. Other than that, due to the restrictions on speed, we may never meet anyone else; we might always be alone - surrounded, perhaps, by a myriad of Celestial Peoples - and yet alone, regardless.