That's when the pioneering moon orbiter — the first lunar probe ever launched by the Indian Space Research Organization — abruptly went silent just 312 days into what was supposed to be a two-year mission. The orbiter has been missing ever since. But the silent, stealthy Chandrayaan-1 couldn't evade powerful radio telescopes. The researchers used the same technique to find NASA's Lunar Reconnaissance Orbiter — an easier task because the LRO is still operational. If scientists want to prevent potentially devastating collisions, they're going to need a powerful system to keep track of everything.

Source: Washington Post March 13, 2017 17:54 UTC