Spaceship come home: can citizen scientists rescue an abandoned space probe?

Keith Cowing and Dennis Wingo are racing gravity. International Sun / Earth Explorer 3 (ISEE-3), an abandoned 1970s spacecraft that once measured solar winds and flew through the tail of a comet, is headed back towards Earth. And last month, the pair of citizen scientists began an effort to make contact. Now, Cowing, Mingo, and their team have until mid-June to fire the thrusters, diverting it into an orbit close to Earth.

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