Astronomers have identified a potentially habitable new planet about 146-light years away from Earth. The candidate planet, designated HD 137010 b, emerged from observations gathered during Nasa's Kepler space telescope K2 mission in 2017. The US space agency described the planet as being "remarkably similar to Earth". It explained: "Although of a stellar type similar to our Sun, the star, HD 137010, is cooler and dimmer. "That could mean a planetary surface temperature no higher than minus 90 degrees Fahrenheit (minus 68 degrees Celsius).