An unmanned U.S. military space plane landed early Saturday after spending a record 908 days in orbit for its sixth mission and conducting science experiments. The solar-powered vehicle, which looks like a miniature space shuttle, landed at NASA’s Kennedy Space Center. Its previous mission lasted 780 days. “Since the X-37B’s first launch in 2010, it has shattered records and provided our nation with an unrivaled capability to rapidly test and integrate new space technologies,” said Jim Chilton, a senior vice president for Boeing, its developer. For the first time, the space plane hosted a service module that carried experiments for the Naval Research Laboratory, U.S. Air Force Academy and others. The module separated from the vehicle before de-orbiting to ensure a safe landing. Among the experiments was a satellite dubbed the FalconSat-8 that was designed and built by academy cadets in partnership with the Air Force Research Laboratory. It was …