October 5, 2011 21:27
NASA Kepler probe sent pictures in which astronomers have seen a huge number of planets that could support life. Now scientists believe that 1.2% of the stars have their own Earth.
University of Hawaii scientists learned new images taken by the satellite Kepler, which was launched in 2009 to search for planets outside the solar system. In the photo revealed 1235 exoplanet in the constellation Cygnus, located in our galaxy — the Milky Way.
According to Daily Mail, based on observations, scientists have assumed that 1.2% of the stars in our galaxy may have inhabited planets, like the Sun. This means that there may be more than a billion other worlds. And are these planets are in the Milky Way core.
"We do not believe that the interior of the galaxy does not have conditions suitable for life, on the contrary the greatest number of habitable planets are found there," — says the study.
Michael Gouanlok University of Hawaii has created a computer model of habitability within the Milky Way Galaxy, to calculate the possibility of life outside our solar system, and to predict the consequences of a supernova explosion, which would literally sterilized the planet's surface. Team of programmers to create the model takes into account the time of appearance of the galaxy and the metallicity of stars. Metals heavier than helium, the building blocks of habitable planets like Earth.
According to this model, to 1.2% of the planet would provide the conditions for the existence of life in any of the specified time periods. The time scale of the Galaxy is incredibly huge, life on the planet can evolve again if she had been killed by radiation from the explosion of a star.
"The stars that emerged later, more likely, there are habitable planets than early generations of stars," — said the researchers.
Scientists argue that the sharp cluster of planets in the galactic nucleus may outweigh the negative effects of a supernova explosion, thus providing a secure area for life.
Scholars dispute which planets could be called "live" and what forms of life may have on them. Opponents of the theory of Michael Gouanloka argue that most of the planets, which he considers suitable for life, in fact, surrounded by a cloud of cold gas.