The Bible doesn’t just give us a bunch of facts; it shows us how God works. Many Christians read the Scriptures without any thought of the processes going on in each narrative, let alone in the big picture. So when a question such as “Is there life on other planets?” gets asked, most reply, “The Bible doesn’t tell us.” Well, yes it does. But it seems you weren’t paying attention.
If you were paying attention, perhaps you’ve been sucked in by academia’s humanistic view that the Scriptures are a product of history rather than the other way around.  Nothing could be further from the truth. Regardless of their current influence and stature, the history of Jesus’ Church barely ever finds traces of such uninspired in the tread of His unstoppable hiking boots.
The main point of the Bible Matrix has been to show how God works, and to interpret the Bible, and history, accordingly. The Biblical history is all about seed and fruit, about barrenness and fruitfulness, about gathering and scattering, and all through the process of Covenant. The modern mind passes over this often repeated theme as though it was only the concern of subsistence farming (Land) and tribal life (womb), both cursed in Genesis 3. Well, the modern mind is correct to a point. But God’s creation is a fractal, and once this fact is received, we see the same processes found in farming and families going on in investment banking, global demographics, software development and even in spiritual warfare.
What process am I talking about? The process of “increase” through faithfulness to a Covenant with God. Real growth is achieved through delayed gratification in obedience to God. We fast that we may enjoy a greater feast.
God could certainly have put life on other planets, but the Spirit only hovered over– “overshadowed”–this one. The “Land” is always feminine, and made fruitful by Covenant. Out of all the worlds, God chose this one. While the other planets are barren, this one has many children. The physical Creation by God, and the subsequent social Creation delegated to the charge of Adam, are inseparable. 
However, we also see the dominion of Christ, through the Gospel, expanding throughout history. If we colonize other planets, it will be “by Covenant,” with technologies given to us by the Spirit of God, and through the sacrifice of individuals with the desire for new frontiers inherent in the Gospel.
So, there’s no life on other planets, yet. Based on how God has worked in the past, it is very likely there will be. The Spirit will overshadow the worlds, but not as He did in Genesis 1. The Spirit now dwells in the Sons of God, making us co-workers with Him–by Covenant–in the maturity of mankind and the conquest of Creation. Perhaps this task will be carried out by the glorified redeemed, but we’ve already made a start, haven’t we?
One day, the phrase “the new world” could be quite literal. Hopefully by then the balance between cultivation and plunder will be “a just measure.” God’s increase begins with wisdom.
 See Did Plato Read Moses?
 Check your boots for hyperpreterism in a decade or two.