NASA meant for the recordings to serve as an auditory and visual time capsule of sorts — and a sleeker, updated take on a six-by-nine-inch golden plaque launched with each of the Pioneer 10 and ...

Pioneer 10, now 7.5 billion miles (12.10 billion kilometers) from Earth, has been silent since March. Currently, a radio signal traveling at the speed of light takes more than 11 hours to reach ...