Scientists discover two potentially habitable 'super-Earth' planets just 12 light years away

Two potentially habitable "super-Earths" orbit a star just 12 light years away that is our nearest sun-like neighbour, scientists have discovered. The worlds at the edges of Tau Ceti's "habitable zone" belong to a solar system of four rocky planets similar in size to Earth. British-led astronomers speculate that the system might be a potential candidate for future interstellar colonisation. But life on the new outposts may be far from peaceful. There is evidence of a massive debris dis