Milky Way Voyager
Launched in 1977 on a tour of the outer planets of the Solar System, Voyager 1 and 2 have become the longest operating and most distant spacecraft from Earth . Nearly 16 light-hours from the Sun, Voyager 2 has reached the edge of the heliosphere, the realm defined by the influence of the solar wind and the Sun's magnetic field. Now humanity's first ambassador to the Milky Way , Voyager 1 is over 19 light-hours away, beyond the heliosphere in interstellar space . Celebrate the Voyagers' 40 year journey toward the stars with NASA on September 5. Poster: Downloads