The US space agency has discovered an exoplanet 146 light–years away that is 'remarkably similar to Earth'. Dubbed HD 137010 b, the planet might fall just within the outer edges of its star's 'habitable zone', meaning there could be liquid water on its surface and a suitable atmosphere for life. 'Although of a stellar type similar to our Sun, the star, HD 137010, is cooler and dimmer,' NASA explained. 'The planet has about a 50–50 chance of falling beyond the habitable zone entirely,' the experts cautioned. 'Otherwise, gathering further data on planet HD 137010 b might have to wait for the next generation of space telescopes.'