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Gliese 581 Earth-like extrasolar planet VIDEOGULP YouTube VIDEO! NASA

http://www.youtube.com/watch?v=r-mVi8i6f9Aendofvid
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GLIESE 581 - PIANETA EXTRASOLARE SIMILE ALLA TERRA VIDEO YouTube VIDEOGULP !

GULP - Esiste un'altra Terra nell'Universo - Su Gliese 581 c'è vita al 100%

Lassù potrebbe esserci qualcuno». Magari non nella forma di un essere umano, magari neanche nella forma di qualche animale terrestre. Ma a venti anni luce dal nostro pianeta, c’è un altro planet that has "a hundred percent chance of having developed the life." This celestial body that is causing an exceptional wave of enthusiasm in the scientific world has a name very unromantic: Gliese 581, by the name of the star around which it rotates, Gliese.

The astronomers have discovered two planets that specialize in finding, Steve Vogt of the University of California at Santa Cruz, and Paul Butler of the Carnegie Institution of Washington. The two researchers have been supported by a team of Swiss astronomers, who have helped them in their calculations. And they are extremely complicated calculations, which are based largely on very slight movements of the stars which prove the existence of a gravitational force exerted by the planets.

Gliese 581 is - in astronomical terms - in our own backyards. It is located in the constellation Libra. Her sun is one of the 100 billion stars that populate the Milky Way, and is with us "only" twenty light years, nearly 200 thousand billion kilometers, ie one million two hundred thousand times the distance that exists between Earth and the Sun Yet the tools today, the science of astronomy can tell us that rely on this planet with a mass three times our location at that distance from its star where water on its surface does not freeze and do not boil. That is: Gliese 581g orbit around its sun close enough because the water does not become ice, but not so much that the excessive heat to evaporate the face. In short, a distance similar to that which divides us from our sun and water is the basic element of all life.

Unlike Earth, however, our gemellone remains motionless on its axis, then its star shows the same face. And that means that half of Gliese 581 is cold and always dark, while the other is always light and warm, "I would say that there must be a climate that would allow us to move in shirt sleeves," said Professor Vogt .

Enthusiasm for Gliese 581 is more than understandable. Since 1995, when it was confirmed that there than those of other planets in our solar system, has never found a celestial body that could be hospitable to the development of life. In these 15 years have been identified with certainty about 200 planets. But generally it's icy balls of rock or gas giants. Although the star has planets orbiting Gliese, too inhospitable as our companions in the solar system. Those closest to the star is too hot, and those more distant are balls of ice. And then there's 581, the planet "probably inhabited by some form of life."

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