NASA's Voyager 2 spacecraft was back chatting it up Friday after flight controllers corrected a mistake that had led to weeks of silence.
Hurtling ever deeper into interstellar space billions of miles away, Voyager 2 stopped communicating two weeks ago. Controllers sent the wrong command to the 46-year-old spacecraft and tilted its antenna away from Earth.
On Wednesday, NASA's Deep Space Network sent a new command in hopes of repointing the antenna, using the highest powered transmitter at the huge radio dish antenna in Australia. Voyager 2's antenna needed to be shifted a mere 2 per cent.
It took more than 18 hours for the command to reach Voyager 2 -- more than 12 billion miles (19 billion kilometres) away -- and another 18 hours to hear back.
The long shot paid off. On Friday, the spacecraft started returning data again, according to officials at California's Jet Propulsion Laboratory.
"I just sort of sighed. I melted in the chair," project manager Suzanne Dodd told The Associated Press.
"Voyager's back," project scientist Linda Spilker chimed in.
Voyager 2 has been hurtling through space since its launch in 1977 to explore the outer solar system. Launched two weeks later, its twin, Voyager 1, is now the most distant spacecraft -- 15 billion miles (24 billion kilometres) away -- and still in contact.
The two-week outage was believed to be the longest NASA had gone without hearing from Voyager 2, Dodd said.
As long as their plutonium power holds, the Voyagers may be alive and well for the 50th anniversary of their launch in 2027, according to Dodd. Among the scientific tidbits they've beamed back in recent years include details about the interstellar magnetic field and the abundance of cosmic rays.
"We've been very clever over the last 10 years to eke out every single little watt," Dodd said. "Hopefully, one of them will make it to 50. But they are old and certainly events like this one that just happened scare the dickens out of me, as far as making that type of a milestone."
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The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Science and Educational Media Group. The AP is solely responsible for all content.
In this Aug. 4, 1977, photo provided by NASA, the 'Sounds of Earth' record is mounted on the Voyager 2 spacecraft in the Safe-1 Building at the Kennedy Space Center, Fla., prior to encapsulation in the protective shroud. (AP Photo/NASA, File)
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