Dear Lisp,
While it is true that science is not equiped to explain God, we need to be careful about becoming anti-scientific. Pareidolia is a fact concerning how the human brain works. God made our brains that way. Thus, it is not anti-spiritual to recognize that, for example, an alleged image of "Mary" on a piece of toast, or on a glass window on a building, or on a wall under a bridge, etc., is not a spiritual phenomenon but is a random pattern that happens to appear to us as being something we recognize. Science explains many things; the phenomenon of Pareidolia that causes us to see such images is one example.
Truth is truth whether it is scientific or religious. Science is the study of God's physical creation - including the study of the human brain. With our God-given intelligence, we humans have recognized that God has wired our brains to see familiar things in our surroundings. Therefore, there is nothing in the science of pareidolia that is incompatible with, or that "fails us," in regard to religion.
I'm not quite sure I understand your argument about gravity, or how you have come to the conclusion that the Roman empire was converted by a phenomenon that causes us to see images in the moon, trees, clouds, rocks, etc., but the point is that science and religion are not mutually exclusive. Science is an invaluable tool in the service of mankind, both in religious and natural matters.
I hope that this helps.
May God bless you