Technology
NASA: Voyager 1 probe has left the solar system
Sept. 13, 2013
Voyager 1 has crossed a new frontier, becoming the first spacecraft ever to leave the solar system, NASA said Thursday.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 (18.51 billion kilometers) from the sun, cruising through interstellar space _ the vast, cold emptiness between the stars, the space agency said.Voyager 1 actually made its exit more than a year ago, according to NASA. But it's not as if