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Published: Friday 13 September, 2013

michael kors factory michael kors factory Alien Earths may have two Suns

In the Star Wars universe, Tatooine was a circumbinary planet that had two Suns. In September last year, NASAs Kepler space telescope had discovered the first reallife circumbinary planet, Kepler16b, a gas giant like Jupiter.

Now, astrophysicists from the University of Texas in the US suggested that Earthlike worlds could exist in the habitable zones around binary systems that are neither too hot nor too cold to support liquid water on its surface, and thus life as we know it. Were telling them where a planet has to be in the system to be habitable. The habitable zone of this system is centered mostly on the systems primary star and extends in a region around it equal to 0.36 to 0.71 the distance of the Earth to the sun. This corresponds in our system to a distance from michael kors factory between Earth and Venus to about Mars, the researchers said.

One possibility the researchers explored involved an Earthsized planet that directly orbits the binary system at distances outside its conventional habitable zone. This corresponds to a distance from the systems primary star equal to twice the distance from Earth to the sun.

To host life in this extended region, such a planet would need high levels of greenhouse gases such as carbon monoxide or methane in its atmosphere to trap warmth. There is less light from the star, so the planet itself has to maintain more heat.

Another possibility involved an Earthsized moon of a gas giant in the habitable zones of Kepler16, the team told the annual meetin michael kors factory g of the American Astronomical Society.

We de michael kors factory termined that a habitable exomoon is possible in orbit around Kepler16b, Quarles said.

Other more exotic possibilities the researchers are considering include an Earthsized planet around the twin stars that gets captured by a gas giant in the system to become a moon, as well as an Earthsized world in a socalled Trojan orbit equidistant from the gas giant Kepler16b and the binary systems primary star. michael kors factory