Statistical analysis showed that our universe may be much more comfortable place to live than it may seem when viewed in its infinite depth of cold

In its work, the Australian and Danish scientists relied on data launched in 2009, the telescope Kepler - the most effective "hunter for exoplanets' in modern astronomy. Through his observations, the number of clearly identified planets around distant stars now close to 2 thousand, and even more candidates awaiting confirmation in repeated observations.

Another "pillar" of the work was the famous rule of thumb Titius - Bode proposed in the late XVIII century. It allows you to calculate the approximate average distance between the planets of the solar system and the Sun itself, and once even possible to calculate the orbit of Uranus - even before the immediate opening of a distant planet. At the beginning of the XXI century Titius - Bode has been adapted for the calculations of the orbits and the distant exoplanets. In general, the principle of its use is simple: the right to impose certain ratio between the radii of the orbits of the planets in the system, so that, knowing the period of revolution of one of them, you can calculate the orbit and the rest.

"We have used the method to calculate the possible orbits of the planets in 151 minutes of the systems, Kepler found and include three to six of the planets," - say the authors of the work. The main purpose of their research was to estimate the number of planets, the orbit of which lies within the "habitable zone" of their stars - that is, at that distance, which is warm enough for water could permanently stored in liquid form, but not so hot that it boil. Simplifying somewhat, we can say that these conditions are a key factor for the emergence and maintenance of life. In any case, in the form in which life we ​​are familiar and understandable.
The 151-th system, considered by scientists, Kepler pointed to the presence of 228 exoplanets, but calculations showed that about a third of them remains in the "habitable zone" and even a rough approximation, but it is habitable. Extrapolating this data to our entire galaxy, it turns out that only one in her life can find shelter from the many billions of stars. It will be someone to talk to!