Scientists are hoping to find the first `alien Earth' by the year 2013 and with that big discovery, humanity will reassess its place in the universe, believe experts.

Undoubtedly astronomers have so far found many exo-planets due to their research of years but they share only one or two key traits with our own world like size or inferred surface temperature, thus they are somewhat still far from identifying the so-called "alien Earth". Hopes are definitely higher to identify the one in the year 2013.

"I'm very positive that the first Earth twin will be discovered next year", said Mr. Abel Mendez, who runs the Planetary Habitability Laboratory at the University of Puerto Rico at Arecibo.

The research for the alien Earth is on since many long years but it gained speed in the year 1995, when astronomers discovered the first exo-planet orbiting a sun like star. Since then, their research has spotted more than 800 worlds beyond our own solar system but wait is still on for the alien Earth.

Moreover, launching of NASA's prolific Kepler Space Telescope in March 2009 has also since then flagged more than 2,300 potential planets but out of the total approx only 100 have been confirmed yet.