For the first time in 37 years, NASA has communicated with Voyager 1 – which is 13 billion miles away from Earth. The space agency made contact with the spacecraft to reorient it and activate its back-up thrusters to better send information back to Earth. Launched in 1977, Voyager 1 is the only known spacecraft cruising beyond our solar system. Prior to leaving, Voyager 1 and its sister ship Voyager 2 gathered, then transmitted to Earth, the first detailed data from Jupiter, Saturn and Titan, Saturn’s largest moon. NASA’s most recent communication with the spacecraft has made adjustments to its alignment, which should extend its usable life by two to three years as it continues its flight into new interstellar territory.
Voyager 1 still communicates with scientists on Earth through the Deep Space Network, a communications system designed in the 1970s that allowed the most recent adjustments to Voyager 1’s trajectory to occur. Voyager 1 has primarily used its main thrusters, which periodically make adjustments to the spacecraft’s flight path to ensure optimum functionality. However, over the years, the main thrusters have become worn down, requiring the earthbound team to turn to Voyager 1’s back-up thrusters, which had not been used since 1980. “The Voyager flight team dug up decades-old data and examined the software that was coded in an outdated assembler language, to make sure we could safely test the thrusters,” said Chris Jones, chief engineer at NASA’s Jet Propulsion Laboratory (JPL).
Despite its long hibernation, Voyager 1’s back-up thruster system returned to duty without major incident. “The Voyager team got more excited each time with each milestone in the thruster test,” said Todd Barber, propulsion engineer at JPL. The mood was one of relief, joy and incredulity after witnessing these well-rested thrusters pick up the baton as if no time had passed at all.” The team intends to conduct the same operation with Voyager 2, which is expected to leave the solar system within the next few years.
Via Science Alert