Voyager 1 Tastes Interstellar Space
Eleven billion miles from Earth, NASA's Voyager 1 spacecraft has entered a "magnetic highway" that connects our solar system to interstellar space. This could be one of Voyager 1's last steps on its long journey to the stars.
http://science.nasa.gov/science-news/science-at-nasa/2012/03dec_voyager1/