NASA Hears From Voyager 1, Most Distant Spacecraft From Earth, After Months of Quiet

CAPE CANAVERAL, Fla.—NASA has finally heard back from Voyager 1 again in a way that makes sense. The most distant spacecraft from Earth stopped sending back understandable data last November. Flight controllers traced the blank communication to a bad computer chip and rearranged the spacecraft’s coding to work around the trouble. NASA’s Jet Propulsion Laboratory in Southern California declared success after receiving good engineering updates late last week. The team is still working to restore transmission of the science data. It takes 22 1/2 hours to send a signal to Voyager 1, more than 15 billion miles (24 billion kilometers) away in interstellar space. The signal travel time is double that for a round trip....