Is It Wrong For Christians To Believe In Aliens/UFOs?

How would it affect your faith if the existence of aliens was proven without a doubt? Sure, this is a highly speculative question but so have been questions that Christians in the past had to face.

How did Christianity handle the idea that there was more to the world than Europe, Asia, and Africa? How did Christianity handle it when flight was finally possible? How did Christianity handle it when we finally left earth's orbit?

But perhaps the idea of finding other "people" beyond the humans of earth is different than all those other discoveries. What would it mean to the biblical account of creation? Who created these other beings? Do they have souls? Do they go to heaven and hell?

It might be easier to handle if the aliens have a religion that correlated with Christianity. But does the Bible even hint at other populated planets?

Every indication from the Bible is that God created humans to be unique in the universe; or clearer that God created angels and humans. (Heb 2:6-8)

Another verse that seems to support a unique inhabited planet earth is:

"For thus says the Lord, Who created the heavens, Who is God, Who formed the earth and made it, Who has established it, Who did not create it in vain, Who formed it to be inhabited: 'I am the Lord, and there is no other.'" - Is 45:18

So, again what if aliens were proven beyond a doubt? What if aliens visited earth? Maybe some people would say we should not even venture to dwell on this since the Bible seems to be so opposed to such a possibility. Would this cause a massive abandonment of Christianity?

Maybe there is a reason that despite many astronomers' claim that statistically the universe should be teeming with life, no other hint of life; not even a microbe off of earth has been discovered.