Andrew Paul is Popular Science's staff writer covering tech news. Previously, he was a regular contributor to The A.V. Club and Input, and has had recent work featured by Rolling Stone, Fangoria, GQ, Slate, NBC, as well as McSweeney's Internet Tendency. He lives outside Indianapolis.
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explained that, while critical to determine the moment when Voyager 2 exited the heliosphere in 2018, its usefulness has decreased considerably since then. At the point of shut-off, the plasma science instrument only offered particularly useful data about once every three months while Voyager’s slow, 360-degree rotation aimed it back at the Sun. Because of this inevitability,
’s “power off” signal sent on September 26 took 19 hours to reach Voyager 2, and yet another 19 hours for its confirmation signal to return. This isn’t the first time engineers pulled the plug on equipment aboard the Voyager probes. After completing their initial mission surveys of the solar system’s gas giants in the 1980’s,
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