NASA never anticipated this. The Voyager 1 probe was launched in 1977 for a four-year mission. Evidently it has retained a trickle of power and NASA has reestablished contact with it at over fifteen billion miles away in space!
Source: CNN Science Wonder Theory, December 7, 2024, “The 47-year-old Voyager probes are exploring interstellar space. Dwindling power could end their journey,” Ashley Strickland,
https://www.cnn.com/2024/12/07/science/voyager-1-science-newsletter-wt/index.html, accessed April 3, 2025.
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