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NASA’s Voyager 1 probe swaps thrusters in difficult repair because it flies via interstellar house

September 11, 2024
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NASA’s Voyager 1 probe swaps thrusters in difficult repair because it flies via interstellar house
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The distant and chilly Voyager 1 spacecraft did a intelligent thruster trick to assist it telephone dwelling.

Voyager 1, probably the most distant human object that’s now flying via interstellar house, had thruster points making it tough for the spacecraft to remain pointed at Earth when calling dwelling. Until Voyager 1 may make a swap to a distinct thruster set, the 47-year-old spacecraft would sail on alone with out assist from Earth. Making issues worse, Voyager 1 is so previous that sudden modifications may harm the spacecraft.

“All the choices we should make going ahead are going to require much more evaluation and warning than they as soon as did,” Suzanne Dodd, Voyager’s venture supervisor at NASA’s Jet Propulsion Laboratory that manages the mission, mentioned in a statement on Tuesday (Sept. 10).

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The science of Voyager 1 is important to house science because it tells us extra about interstellar house, which means the area of the cosmos exterior of the attain of the solar’s gravity or particles. 

However the spacecraft’s growing older nuclear energy supply is far diminished, and would not have a lot energy to play with. So engineers at JPL launched into a rescue plan to assist the spacecraft’s pointing capabilities with out risking its remaining useful science devices.

Voyager 1 and its twin, Voyager 2, launched on their preliminary missions in 1977 to check the distant photo voltaic system. They collectively flew by 4 largest outer photo voltaic system planets by 1989 and proceed, with tweaks for his or her age, to ship science from afar even after each exited the photo voltaic system within the early 2010s.

two blue and large planets side by side in an illustration

A picture of Uranus on the left and Neptune on the best, obtained by the Voyager 2 spacecraft. (Picture credit score: Patrick Irwin)

As with people, growing older introduced modifications to the Voyager methods. The gasoline tube for his or her thrusters have been susceptible to clogging for greater than 20 years; that occurs as a rubber diaphragm in every spacecraft gasoline tank degrades, making a silicon dioxide byproduct that clogs the road.

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Fortunately, every Voyager has three thruster branches obtainable to be used: two angle branches initially designed for orientation, and one trajectory correction department made for pathway modifications in house. To be clear, engineers have been overcoming the sudden for many years by creatively repurposing elements of Voyager. This new thruster scenario, nonetheless, introduced further challenges.

a diagram showing a bubble around the sun and the positions of voyager 1 and 2, representing the area of the heliosphere

Artist’s impression of the elements of the heliosphere, or the area of affect of Earth’s solar. Proven additionally (to not scale) are the Voyager 1 and Voyager 2 spacecraft from NASA, which are actually in interstellar house. (Picture credit score: NASA)

On Voyager 1, a gasoline tube within the first angle propulsion department started to clog in 2002, necessitating a swap to the second department, NASA officers wrote in the same statement. When the second department started performing up in 2018, Voyager 1’s orientation maneuvers all switched to the trajectory correction maneuver department. 

However with use, this single department of the trajectory correction system has been clogging severely, to a fair worse extent than both angle propulsion department did earlier than.

JPL subsequently determined to change again to the angle propulsion system, however that they had to take action with much less energy obtainable than in 2002. Voyager 1 is operating on important methods solely, and even a few of its heaters have turned off. 

Between that crucial lack of some heaters — and the diminished radiant warmth from fewer methods operating on the spacecraft — Voyager 1’s dormant angle propulsion thruster department was so chilly that even turning it on may trigger harm.

Scrutinizing Voyager 1 fastidiously from afar, JPL engineers decided switching one of many heaters on for an hour could be sufficient. The command labored and on Aug. 27, one of many angle thruster branches efficiently reoriented Voyager 1 in the direction of Earth for the primary time in six years.

Voyager 1 required one other type of inventive troubleshooting just lately; engineers in June resolved an information transmission downside plaguing the spacecraft for months. 

Engineers at JPL plan to maintain the Voyager twin spacecraft operating till not less than the fiftieth anniversary of the mission in 2027, Dodd instructed reporters in June at a gathering of the house science group’s outer planet evaluation group, according to SpaceNews. 

The group extra usually offers with exploration actions within the outer reaches of the photo voltaic system; it could present recommendation to NASA, however the company doesn’t essentially comply with suggestions, according to NASA.



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