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Probably one of four "suns" could have planets the size of Earth. It is the conclusion reached by a team of astronomers from the University of California, Berkeley, after studying 166 G-type stars (like the Sun) and K (orange stars less massive than our Sun), less than 80 light years from Earth, using the Keck telescopes in Hawaii. In total found 22 stars with planets detectable.

"If we take typical 100 stars like the Sun, only one or two planets are Jupiter-sized, six have planets like Neptune and 12 would be super-Earths, ie with a mass of 3 to 10 times higher than of our planet, "says Andrew Howard, co-author of the study. As for planets similar to Earth's size, predict that there are 23 per 100 estrellas.Es say that if the trend in increased number of smaller planets, 23% of stars have Earth-like planets.

"What this means," Howard added, "is that if NASA develops new techniques during the next decade to find Earth-like planets will not have to look very far. " The next step is to determine how many of these planets could support life, for what is necessary to determine if they are in the habitable zone, ie at a distance from the star neither too hot nor too cold for liquid water.

"One of the goals of astronomy is to find the value of the 'eta-Earth' (ηTierra), ie, the percentage of stars like the Sun that has

No one Earth" "This is a first estimate, and perhaps the real number is one out of eight instead of a in four. But there is one in 100, and that is great news, "said Howard. have already been detected these planets planetas.Si twelve candidates included in the count, the team detected a total of 45 planets orbiting of 32 stars. ( + info )