December 21, 2011 - Nasa seems to be closing in on finding a earth
that intently resembles Earth
and can help alien life, after the Kepler telescope tracked down two celestial bodies of nearly similar dimensions to us.
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
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.
For your iPad: Metro tablet edition launchedMetro has launched its initial interactive model of the newspaper designed particularly for the iPad
- and it's free...