A study by Johns
Hopkins University of Maryland (USA) completed that the probe Voyager 1,
launched on September 5, 1977, is as close to the heliopause (the boundary
where the solar wind disappears and begins the interstellar medium ) as
scientists believed.
Voyager 1 is now in the
heliosheath, the region anterior to the heliopause, where the solar wind slows
and begins to show the effects of the interstellar medium.
