Two 'new Earths' found by Kepler space probe
Subsequent on from the discovery of Kepler-22b earlier this month, which had the same ambient atmospheric temperature as Earth and most probably has drinking water on its surface, the finding is becoming hailed as a 'milestone'.
Nonetheless, although each new planets - named Kepler-20e and Kepler-20f - are the appropriate size, their orbits about their star are also short and as a result the surface temperatures are probably to be way too quick.
One year on Kepler-20e is just six days extended whilst Kepler-20f's orbit is 19 days.
Astronomer David Charbonneau of Harvard University, who is concerned in the space research project, said: 'Kepler-22b has the correct temperature, but it is as well huge. [The planets] we are announcing today are just the proper size, but as well sizzling.
'But you can wager that the hunt is on to locate a world that moyen the best of equally worlds, a correct Earth twin.'
Despite the fact that scientists have ruled out alien life on each new discoveries, they have suggested the two planets had been not often insufficient to support ecosystems related to Earth's.
A planetary 'line-up' depicting the Earth-sized extrasolar planets Kepler-20e and Kepler-20f, alongside Earth and Venus (Photo: PA)
'If Kepler-20f was shaped with h2o, which I think is likely, then it could have held on to its h2o for a number of billions of years,' explained astronomer Linda Elkins-Tanton with the Carnegie Institute in Washington DC.
'That signifies this world could have been habitable in the past for a lengthy time period.'
The Kepler solar system is found about 1,000 light-years from Earth, and part of the constellation, Lyra.
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A NASA illustration compares our own solar system with Kepler-22b, a star system containing the first 'habitable-zone' planet discovered by the Kepler mission. Photograph by: Getty Images, Agence France-Presse The quest to find alien life took a step forward Tuesday as the discovery of the first Earth-sized planets was made public.
NASA's Kepler space telescope has detected two extrasolar planets that are no larger than Earth, and possibly smaller, making them the smallest exoplanets found to date. The two planets orbit the same star, which astronomers have named Kepler-20. Located about 945 light-years away in the constellation Lyra, Kepler-20 is approximately 90 percent...
( via metro.co.uk )
jaslws wrote April 10, 2013 4:53:24 AM CEST
earth like planets are closer than we think