For Humans this Solar System is All There Is

[John]

Not with that attitude..

The Bible says we will reach another solar system by the New City with walls 216 feet thick and 1379 x 1379 x 1379 miles with God and the Lamb at the center. You can't do it on your own. You would need God. You're only deluding yourself otherwise.

Alpha Centauri Bb is 4.3 light years from our sun. There is evidence a planet orbits this star, although this has (to my knowledge) not been scientifically confirmed.

Tau Ceti e is approximately 11.9 light years from our sun. A terrestrial (rocky or metallic) thermoplanet planet orbits inside its habitable zone. So your estimate of how long it would take humans (traveling at light speed) is off by a factor of 168. There are plenty of extra solar planetary systems within just 50 light years from our solar system.

Exactly. It would take generations and generations.

Why? What if they started their journey 20,000 years ago and just reach earth today?

You can live your life on that expectation but it is just fantasy. No such technology exists without the aid of God.

Crazy people can talk about non crazy things and turn them into an insane ideas, sure.

I've seen many crazies make a mockery of many religions. That in its self does nothing to prove or disprove the validity of the concept.

Of course alien seekers are crazy since aliens don't exist. Not enough planets exist in the universe from the 800 variables required for life to exist.