The only thing I know for sure is that I can't verify it, but absence of evidence is not evidence of absence
but I have circumstantial evidence, e.g.
Dzogchen tantras say that these teachings are present in thirteen different solar systems.
For other beings,other forms of life may be so different from our form
that even if we were to stand next to one of such forms right now, we might not even realize that the thing next to us is life.
So,planets which we know are exist may be inhabited,and these life forms can influence on our lives
maybe planet itself is a life form so different from our own that we perceive it as dead matter
Why, out of the trillions of things in the universe, few balls of stone and gas?
because only these few belong to our solar system,for example