I'm going to confess, I am a bit of a geek and VERY interested in space and everything that is or might be in it. The first question that popped into my mind was this: If there are aliens who are trying to contact us by bending agriculture into symbols (that sounds crazier every time I try and reword it) do they know and have a relationship with God?
But then it occurred to me. Aliens and the Trinity are kind of similar to us! The trinity is so difficult to understand because it is so different from our experience (one might say alien to it). In fact it is so difficult and different that we don't discuss it or think about it at all. But for those of us who have experienced its power, we are never the same. So maybe we need to think in terms of a trinity abduction. I could go on, but I will stop while I am still sounding a bit sane.
BTW, there's a series of fiction books that talks about aliens and God written by C.S. Lewis starting with Out of Silent Planet... if you are into that sort of thing.