At last, Voyager 1 slips into interstellar space

Solar blast data provides definitive evidence that spacecraft has cruised beyond the sun’s clutch

By Andrew Grant, 13:48 PM September 12, 2013

Humankind has officially extended its reach to the space between the stars.

NASA’s Voyager 1 spacecraft exited the vast bubble of particles that encircles the sun and planets on August 25, 2012, mission scientists report September 12 in Science. At the time, Voyager was about 18.2 billion kilometers from the sun, or nearly 122 times as far from the sun as Earth.

“This is the beginning of a new era of exploration for us,” says Edward Stone of Caltech, who has headed the Voyager mission since 19...

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