NASA successfully fires Voyager 1 thrusters after 37 years

[ahlam1399]

NASA successfully fires Voyager 1 thrusters after 37 years

WASHINGTON: NASA´s Voyager 1 spacecraft ? cruising interstellar space billions of miles from Earth ? was back on the right track Friday thanks to thrusters that were fired up for the first time in 37 years.
The unmanned spaceship was launched along with its twin, Voyager 2, more than 40 years ago to explore the outer planets of our solar system, traveling further than any human-made object in history. But after decades of operation, the ?attitude control thrusters? that turn the spacecraft by firing tiny ?puffs? had degraded.
The small adjustments are needed to turn Voyager´s antenna toward Earth, allowing it to continue sending communications. ?At 13 billion miles from Earth, there´s no mechanic shop nearby to get a tune-up,? NASA said in a news release. Experts at the agency´s Jet Propulsion Laboratory in California decided to turn to four backup thrusters that were last used on November 8, 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?The Voyager flight team dug up decades-old data and examined the software that was coded in an outdated assembler language, to make sure we could safely test the thrusters,?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 JPL.
The engineers fired up the thrusters on Tuesday and tested their ability to turn Voyager using 10-millisecond pulses.

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