Fermi’s Paradox: Where is everybody?
Our sun is one of 400 billion stars in the Milky Way galaxy, and our galaxy is one of 200 hundred of billion galaxies in the observable universe. Since we know that our planet is not the only planet orbiting a star, it is natural to ask if life could form somewhere else in the universe. Every dot of light we see in the night sky is another chance for life to exist. Logically, if life happened here it could happen elsewhere. It is assumed that form life to form, liquid water must be present. Although we can imagine all sorts of organisms that may thrive in all sorts of environments, but we’d best begin our search in looking for planets with conditions we know that is possible to harbor life. So in order to have liquid water, the planet should be at the right distance from its parent star. If a planet is too close to the star, water would boil and evaporate; and if a planet is too far, water would freeze. It would be practically impossible for life to form. In our galaxy alone, it is estimated that there are about 10 billion stars that can support and sustain life, and about a hundred billion planets that could have liquid water and Earth-like temperatures on their surface. But we are more interested in finding an intelligent life, specially, a kind of intelligence that can correspond and communicate with us despite the huge distances of the stars. We are curious about their way of life, their cultures, their religion, and their appearance. The first one to ask this question was Enrico Fermi. It became known as the Fermi’s Paradox. Fermi realized that if our galaxy has been around for over 10 billion years, then there had been several times for countless intelligent species to take possession of the Milky Way. If intelligent life had enough time to progress, then there should be some observable sign of them in the heavens. But looking around, he didn’t see any clear indication that they’re out and about. So where is everybody? If they exist at all, they are extremely far away or if it is just us, then it looks like an awful waste of space.