Nasa hears signal from Voyager 2 after mistakenly cutting contact

After days of silence, NASA has heard from Voyager 2 in interstellar space billions of miles away. Flight controllers accidentally sent a wrong command nearly two weeks ago that tilted the spacecraft’s antenna away from Earth and severed contact. NASA's Deep Space Network, giant radio antennas across the globe, picked up a “heartbeat signal," meaning the 46-year-old craft is alive and operating, project manager Suzanne Dodd said in an email Tuesday.