Voyager 1, launched in 1977, is speeding away from the sun at more than 100,000 miles per hour. And as Popular Science writes, it may leave our solar system any day now. Its sister satellite, Voyager 2, is several billion miles behind, and will cross the boundary after Voyager 1.
Voyager Could Leave Our Solar System Any Day Now
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June 20, 2011 8:05 a.m.
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