But it does say quite a bit about spiritual "life."
When you break it down, there are three (and only 3) kinds of spirt beings mentioned in the Bible: God, angels, and human beings. That's it. I believe the Bible gives us enough information that we can be prepared for any spiritual questions that might arise.
Given that, if space aliens one day appear, we can start by scratching a few things off.
(1) They aren't God.
(2) They aren't human beings.
That leaves as possibilites:
(1) They are physical beings that have no spirt component.
(2) The are not alive (given advances in robotics, special effects, etc... it might be possible to create a device or illusion that would seem to be alive to the casual (or maybe not so casual) observer.
(3) The are angels of some type masqurading as space aliens.
They just might turn out to be human beings. The Bible does not prohibit the Cosmos being populated by more of us. I think this would be the case even if they don’t look like us. After all, there are many races of us just here on the earth.