NASA’s LRO pings Vikram, opens door to new style of locating targets on Moon

NASA successfully transmitted and reflected a laser beam between its Lunar Reconnaissance Orbiter (LRO) and Isro's Vikram lander on the Moon's surface. The LRO pointed its laser altimeter instrument towards Vikram, which was 100km away, and registered light that had bounced back from a NASA retroreflector on the lander.