NASA has revealed that the Voyager 2 deep-space probe, originally launched in 1977 and some 11 billion miles away, has experienced increased bombardment of cosmic rays, a sign that it may be crossing the heliopause, the boundary that separates the Solar System from interstellar space.

A similar phenomenon was observed when Voyager 1 crossed into interstellar space in 2012.  

News Team
9 October 2018