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NASA’s Voyager 1 Resumes Sending Engineering Updates to Earth
(blogs.nasa.gov)
This is a most excellent place for technology news and articles.
Even in absolutely dark space, there are kinds of things around. A tiny spec of dust, a large fragmented rock, radiation...anything. this was a largely unshielded device as we know it today. It had some foil to reflect radiation from the sun, and I think that's about it. Even in space, everything will degrade over time from one thing or another given enough time. This thing has had 45+ years.
I saw this documentary once where a spaceship picked up one of them and it was crazy nuts.