(Jn. 10:16) I have other sheep, which are not of this fold. I must bring them also, and they will hear my voice. They will become one flock with one shepherd.

Traditionally this is interpreted as Christ saving not only Jews but also gentiles (other sheep). But I believe it also means that there are aliens not from this fold that is not from this planet.

There are also an other verse which signifies that aliens exist:

(Mt. 23:37) “Jerusalem, Jerusalem, who kills the prophets, and stones those who are sent to her! How often would I have gathered your children together, even as a hen gathers her chickens under her wings, and you would not!.

Her wings signifies wings of Christ that is wings of flying machines which belong to aliens which belong to Christ.

Christ many times wanted to gather people under the wings of his flying machines, but people would not.

Let’s wait for the second come of Christ when he will bring His wings to the Earth.