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Voyager 2 launch, 40th anniversary
On Aug. 20, 1977, Voyager 2 began its mission through our solar system, the first of the two Voyager spacecraft to launch. It is the only Earth spacecraft that has visited Uranus or Neptune, and is now on its way to interstellar space. Read about the NASA engineers who have spent decades guiding this mission here: http://nyti.ms/2i6PM3j