I did some research and i have thought of this in our solar system there are 9 planets of which (as we know so far) 1 has life i have searched and there are 10000000000000000000000 stars in the universe. With a conservative estimate of three planets per star (some could have many more, some would have none at all) this puts the estimated number of planets into millions of billions.

Then thinking mathematical the chances are pretty good that we have life in many places in the univers