Nasa hears signal from Voyager 2 spacecraft after mistakenly cutting contact

The 46-year-old Voyager 2 is currently more than 12 billion miles from Earth (NASA/AP)

After days of silence, Nasa has finally heard from Voyager 2 in interstellar space billions of miles away.

Flight controllers accidently sent a wrong command to the spacecraft nearly two weeks ago that tilted its antenna away from Earth and severed contact.