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The diagnosis is in—bad memory knocked NASA’s aging Voyager 1 offline
(arstechnica.com)
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It won't necessarily come back. Till the orbits of Voyager and the Solar system intersect, we would've merged with Andromeda, which would completely change all orbits in unpredictable ways. So no, you cannot say with confidence that Voyager will return back to the Solar system before the Sun dies purely using orbital mechanics.