In our Galaxy, more than 10 billion planets similar to Earth.

Our galaxy - the Milky Way - contains at least 100 million planets indicates a statistical study based on the finding planets outside our solar system using gravitational microlensing.

On it informs RIA Novosti news agency referring to was published in the journal Nature Art..
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Now scientists know more than 700 planets outside our planetary system. Most of them were found either from the analysis of the gravitational influence of the planet on its star ( radial velocity method ) or to reduce the star's light when the planet passes between the star and the observer, and there is a slight ...
However, both methods allow a much greater probability of finding a planet with a large mass or located close to its star. In particular, using the transit method, you can see only the planet 's orbital plane which lies in the line of sight. So many planets are being overlooked.
PLANET and OGLE Group conducted a search for extrasolar planets by another method - the method of gravitational microlensing. It uses the following physical effects: the gravitational field of the central star, in combination with the field of planets, perhaps around this star, acts like a lens that magnifies the background brightness of the star. If the star, which serves as a gravitational lens, there is a planet, this planet can make a significant contribution to the increase in the brightness of the background stars.
In the six years of PLANET and OGLE recorded three exoplanets ... The authors have combined these data with information on all seven planets found in the same manner and with a huge number of cases in six years the amount of data when the exoplanet was detected.
Statistical analysis showed that the planets in our galaxy is much larger than previously thought.
... Cold Neptune ( from 10 to 30 Earth masses ) and super-Earths ( 5 to 10 Earth masses ) are spread more widely - they occur in 52% and 62% respectively of stars ...
In sum, these results indicate that the average number of planets around a star more than one.
... But now it seems that the stars around the Milky Way, turn literally billions of planets with masses close to the mass of the Earth ...
Scientists obtained data show that within 50 light years from Earth, there must be thousands of planets about 1.5. At the same time in our galaxy must be more than 10 billion planets similar to Earth.