WASHINGTON, April 4 (UPI) -- NASA's Kepler mission to search for alien planets has been approved for extension through fiscal year 2016, the space agency said.
The approval, which followed a recommendation by the agency's Senior Review of its operating missions, means the Kepler space telescope will spend another four years searching for Earth-size planets in the habitable zone -- the region in a planetary system where liquid water could exist on the surface of an orbiting planet -- around sun-like stars in our galaxy, NASA said Wednesday.