I do not speculate very much as to whether there is or is not life in outerspace. But I know this, Hashem created this universe for the purpose of Creating Israel and bringing our people to the forefront of our day. That said I personally do not believe that our universe will ever be detroyed (Noah story) and that there is a possiblity that in the very very very distant future, man will take to the stars. Perhaps G-d has planted other life on the other planets for our own edification. But I do not expect that there is another planet of people who are created to serve our Creator in the way that our people exist today. I do not believe in a parallel universe where there might be another sentient people who know our Creator, though it is an interesting considering to speculate and wonder about.
That said, what you see here on Earth is what it is about.
The Jewish people have a mission and God created this universe to give us Torah.
Do you think that there is Torah in another part of universe? That is the interesting question. But I profess that I believe that we are it on this lonely crazy planet and that the other planets if they have a people they are only for the benefit of our Existence as we are the ones who have Torah.