If we want to find extraterrestrial life, it must first address the question of where we should look. Almost every day, astronomers discover new planet and try to determine the possibility of having them on the water in liquid form. After all, the water, according to scientists, could be an indicator of what the planet can support life.
In addition, scientists are trying to study the composition of each new discovered planet, its density and size. Also important is the determination of whether the planet is potentially within the habitable zone of its star. All of these factors are now the key, and perhaps the only means of determining whether there is a probability of life on some planet discovered in the vast expanses of space.
Puerto Rican poster Arisibo University published an article that talks about the fact that, according to an international team of astronomers led by Dr. Louis Irwin, in our galaxy, the Milky Way may be at least 100 million planets capable of supporting life. This conclusion scientists came through the development of special mathematical method. Moreover, according to scientists, all these planets may contain not just microbial life, but also more complex kinds of living organisms, which may not be as intellectually developed as people.
Irwin and his colleagues studied a list of over a thousand different exoplanets in our galaxy. Using a formula that takes into account the density, temperature, structure (liquid, solid or gaseous), chemical composition, distance from its star and the age of the planet, a team of scientists led a computer model of the so-called index of biological diversity, the scale of which, according to the figures, and various characteristics, shows the ability to support the variety of multicellular life.
Further calculations on the basis of this formula shows that about two percent of the more than 1,000 planets discovered have a friendly environment, compared with the same Europe, one of the moons of the planet Saturn, which, according to scientists, too, can be a life in one way or some form. If we consider that in our galaxy is more than 10 billion stars in and around each of them has a planet, the final figure of potentially habitable planets of this number may be about 100 million.
Unfortunately, current technology does not allow to test these mathematical calculations practical observations. So long as people do not create any warp drive for fast inter-dimensional travel, learn the accuracy of mathematical calculations, we can not. Even the closest planet outside our solar system is at least 20 light years from us.