London Telegraph 
March 29, 2012
Researchers discovered that at least 100 of the ”super-Earths” may be on our galactic doorstep, at distances of less than 30 light years, or about 180 trillion miles, from the sun.
Astronomers say the findings were made after conducting a survey of red dwarf stars, which account for about four in five stars in the Milky Way.
They calculate that around 40 per cent of red dwarfs have a rocky planet not much bigger than Earth orbiting the ”habitable zone”, in which liquid surface water can exist.
Scientists say that where there is water, there also could be life although they add that being in the habitable zone is no guarantee that life has evolved on a planet.