Voyager 2 Is Getting Close to Interstellar Space

(via Popular Mechanics)  It appears that Voyager 2 will be following its sibling through one of the ultimate barriers in spaceflight: the border of interstellar space.  NASA is reporting that the Voyager 2 probe, launched on August 20, 1977, has detected “an increase in cosmic rays that originate outside our solar system.” With that data and the fact that Voyager 2 is almost 11 billion miles away from home, scientists assume that it close to leaving the confines of the solar system.