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NASA said Voyager 1 has crossed a new frontier, becoming the first spacecraft ever to leave the solar system. Thirty-six years after it was launched from Earth on a tour of the outer planets, the plutonium-powered probe is more than 11 1/2 billion miles from the sun, cruising through what scientists call interstellar space.
|NASA: Voyager 1 Probe Has Left The Solar System|
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