A few years ago, flying saucers were the talk of people everywhere, and various stories and explanations were repeated, from those who said that they were one of the secret weapons that one country possesses and was experimenting with on a large scale, to those who claimed that they were spaceships that came to us from an unknown world, led and directed by mighty minds, blessed with abundant intelligence. The talk of flying saucers and cosmic stories - although they may seem imaginary to us - are in fact based on scientific facts revealed by astronomical studies since the late nineteenth century, and in this regard we can only examine together these facts from their various aspects until we can choose one of two things... Either we categorically deny the existence of life in places other than Earth, or the cosmic stories will gain more supporters and supporters.