Nasa's Kepler telescope finds 10 Earth-like planets: 'We are not alone'

Rocky worlds discovered by Kepler telescope are right distance from their parent stars for water to pool on the surface

Astronomers have added 219 candidates to the growing list of planets beyond our solar system, 10 of which may be about the same size and temperature as Earth, boosting their chances of hosting life.

Scientists found the candidates in a final batch of Nasa's Kepler Space Telescope observations of 200,000 sample stars in the constellation Cygnus.