when Voyager 1 comes within 1.7 light-years of the star AC +79 3888. (The star itself is roughly 17.5 light-years from Earth.)
However, Voyager 1's falling power supply means it will stop transmitting data by about 2025,
meaning no data will flow back from that distant location.
Voyager 2 launched on Aug. 20, 1977,
and Voyager 1 launched about two weeks later, on Sept. 5.
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