After months of silence, Voyager 1 has returned NASA’s calls
For the last five months, it seemed very possible that a 46-year-old conversation had finally reached its end. Since its launch from Kennedy Space Center on Sept. 5, 1977, NASA’s Voyager 1 spacecraft has diligently sent regular updates to Earth on the health of its systems and data collected from its onboard instruments. But in November, the craft went quiet. Voyager 1 is now some 15 billion miles away from Earth. Somewhere in the cold interstellar space between our sun and the closest stars, its flight data system stopped communicating with the part of the probe that allows it to send signals back to Earth. Engineers at the Jet Propulsion Laboratory in La Cañada Flintridge could tell that Voyager 1 was getting its messages, but nothing was coming back. “We’re to the point where the hardware is starting to age,” said Linda Spilker, the project scientist for Voyager mission. “It’s like working on an antique car, from 15 billion miles away.” Week after week, engineers sent troubleshooting commands to the spacecraft, each time patiently waiting the 45 hours it takes to get a response here