Voyager hits magnetic highway on its way to the stars

NASA’s venerable spacecraft, Voyager 1, has entered the farthest reaches of our solar system ahead of hitting interstellar space. Scientists refer to this new region as a magnetic highway for charged particles because our Sun’s magnetic field lines are connected to interstellar magnetic field lines. This connection allows lower-energy charged particles that originate from within the heliosphere to zoom out and lets higher-energy particles from outside stream in.

NASA Voyager 1 Encounters New Region in Deep Space – NASA Jet Propulsion Laboratory.