London Telegraph 
Feb 21, 2011
The chances of finding alien life have been given a boost after it was revealed that one in two stars in the universe have Earth like planets orbiting around them.
The news came from NASA scientists studying the results from the Kepler telescope which in its first two years in space has found evidence of more than 1,200 planets in orbit around far distant stars.
The early findings suggests that there are triple the number of known planets outside our own solar system – 54 of them are Earth size and in the habitable zones from their suns.
Only two potentially habitable planets have previously been found outside earth’s solar system, so Kepler scientists are very excited at finding so many possible candidate planets.