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Of the 10 science instruments Voyager 1 started its journey with, four are currently gathering data on its cosmic environment, and each year, the spacecraft loses more of its precious power supply.
The latest issue experienced by Voyager 1 first cropped up in November 2023, when the flight data system’s telemetry modulation unit began sending an indecipherable repeating pattern of code.
But it’s just one of many challenges the mission team has had to face in recent years as Voyager 1, and its twin probe, Voyager 2, continue to defy the odds and explore space more than 47 years ...
Voyager 1 overtakes Pioneer 10 as the most distant spacecraft from the Sun, at 69.419 AU. Voyager 1 is moving away from the Sun at over 1 AU per year faster than Pioneer 10. 2004-12-17 Passed the termination shock at 94 AU and entered the heliosheath. 2007-02-02 Terminated plasma subsystem operations. 2007-04-11 Terminated plasma subsystem heater.
Although other probes were launched first, Voyager 1 has achieved a higher speed and overtaken all others. Voyager 1 overtook Voyager 2 a few months after launch, on December 19, 1977. [12] It overtook Pioneer 11 in 1981, [13] and then Pioneer 10—becoming the probe farthest from the Sun—on February 17, 1998. [14]
Also as of 2024, Voyager 1 and Voyager 2 are the only probes to have actually reached interstellar space. [1] The other three are on interstellar trajectories. Contact to Pioneer 10 and 11 was lost long before they reached interstellar space. The termination shock is the point in the heliosphere where the solar wind slows down to subsonic speed.
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The spacecraft launched in 1977 and is now 15 billion miles from Earth. It went silent in November. Scientists at JPL figured out how to get it talking again.