For about 35 years, the NASA probe Voyager 1 has been racing toward the edge of our solar system. Now in June 2012, it has almost reached a point where no human-made device has gone before: interstellar space.
Written by: William Atkins | Published in: SpaceNASA's Voyager 1 spacecraft left Earth about 35 years ago. It is now traveling near the edge of our solar system. Before it reaches interstellar space, the spacecraft has discovered a new region of the solar system called the magnetic highway.