Voyager 1 Replies After 22-Hour Signal Delay, Extending 49th Year of Flight
Updated
Updated · spacedaily.com · Jun 23
Voyager 1 Replies After 22-Hour Signal Delay, Extending 49th Year of Flight
3 articles · Updated · spacedaily.com · Jun 23
Summary
A command sent Monday drew a reply from Voyager 1 on Wednesday, confirming the spacecraft is still operating nearly 49 years after its 1977 launch.
At about 166 astronomical units from the Sun—roughly 25 billion kilometers away—the probe needs about 22 hours for signals to travel each way, turning even simple exchanges into multi-day operations.
Voyager 1 now runs on roughly 250 watts, down from about 470 at launch, and engineers have pared operations to two instruments—the plasma wave subsystem and magnetometer—to conserve power into the early 2030s.
The spacecraft crossed into interstellar space in 2012 and continues outward at about 17 kilometers per second, while the team sustaining it has largely replaced the generation that designed and launched it.
As its original team passes away, what secrets will Voyager 1's final whispers from interstellar space reveal?
Can a 'Big Bang' software fix resurrect dormant instruments on a probe launched before the internet existed?
Voyager 1’s 49-Year Odyssey: Approaching One Light-Day, Managing Power, and Humanity’s Message to the Stars
Overview
As of June 2026, Voyager 1 continues its journey at the edge of interstellar space, facing ongoing power challenges that require critical maneuvers to extend its operational life. To manage its dwindling power reserves, the Voyager science and engineering teams have strategically shut down the Low-energy Charged Particles experiment (LECP), following a broader plan that has already powered down seven of the ten identical instrument sets. These careful decisions ensure that Voyager 1’s unique scientific mission can persist, allowing the spacecraft to keep sending valuable data from beyond our solar system despite its limited resources.