Enlarge / Artist’s illustration of the Voyager 1 spacecraft.Caltech/NASA-JPL
It’s been four months since NASA’s Voyager 1 spacecraft sent an intelligible signal back to Earth, and the problem has puzzled engineers tasked with supervising the probe exploring interstellar space.
But there’s a renewed optimism among the Voyager ground team based at NASA’s Jet Propulsion Laboratory in California. On March 1, engineers sent a command up to Voyager 1—more than 15 billion miles (24 billion kilometers) away from Earth—to “gently prompt” one of the spacecraft’s computers to try different sequences in its software package. This was the latest step in NASA’s long-distance
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