Nasa Kepler telescope discovers planet believed to be most Earth-like yet found

Kepler-186f is 10% bigger and occupies its star's 'habitable zone' where temperatures would allow liquid surface water A newly discovered planet may be the most Earth-like yet found in another solar system, scientists believe. Kepler-186f is almost the same size as the Earth and occupies its star's "habitable zone" where temperatures are mild enough to allow liquid surface water.