 I would agree with you that the question of whether there is life on other planets is something of an open question. And even if we did discover that there was, it would still leave us with the same question, where did they come from? And I think you'd have to have the same answer, or same set of answers. Either they spontaneously were generated by just a purely material cosmos, or they were created by a divinity that is God, and we're back to the same set of questions that we started with.