NASA's Voyager 1 Explores Final Frontier of Our 'Solar Bubble'

Data from Voyager 1, now more than 11 billion miles from the sun, suggest the spacecraft is closer to becoming the first human-made object to reach interstellar space.

via NASA Breaking News

http://www.nasa.gov/home/hqnews/2013/jun/HQ_13-191_Voyager_Solar_Bubble.html