The US Space Force will bid the summer farewell by once again launching its (not-so-secret) secret space plane, the X-37B. The Space Force touted plans to test a new laser communications system, as well as the “highest performing quantum inertial sensor ever tested in space.” The former project is overseen by the Air Force Research Lab, and will focus on beaming data-packed infrared light to low-Earth orbiting satellites. Meanwhile, the quantum inertial sensor demonstration will offer engineers at the Defense Innovation Unit an unprecedented opportunity to continue fine-tuning an unaided, space-based navigation system intended to be a successor to GPS. “This technology is useful for navigation in GPS-denied environments and consequently will enhance the navigational resilience of U.S. spacecraft in the face of current and emerging threats,” Space Force explained in its announcement. Quantum inertial sensors may also be instrumental for astronauts stationed at a permanent lunar base.