Scientists have identified 20 potentially habitable “twins” of the Earth.
Astronomers from the US and France called the exact number currently detected by the Kepler mission of earth-like exoplanets.
Devoted to a study published in The Astrophysical Journal and is available on the website arXiv.org briefly about it, reports the University of California at San Francisco.
The number of planets outside the Solar system, resembling the Earth discovered to the present time, is equal to 216. These heavenly bodies are in the habitable zone around its sun, that is, on the surface may be liquid water.
Of these, 20 are considered to be exoplanets located in a conservative part of the habitable zone, that is, the probability of availability of conditions for life the maximum.
Scientists presented data were obtained in the analysis of materials of the Kepler mission, during which more than four thousand selected exoplanets most similar to Earth of a celestial body.
The habitable zone of a celestial body in orbit is determined from luminaries having on its surface liquid water. In the Solar system within this band fall Venus, Earth and Mars. According to a conservative estimate of the habitable zone reaches the Ground. In contrast, Mars is too cold and Venus is hot.
