There are actually 2 subjects here. 1. Alien life existence in the Universe which I believe there is in many different forms. 2. The fact that no telescope will show us the present since life has to travel with finite speed to get us any information (radio telescopes included) . I am just saying again that all we see is past starting from minutes ago to millions years ago as it takes that long for the light to get to us to bring any information. Think about it.