voyager 1 crossed into interstellar space in march 2011.
when did voyager 1 cross into interstellar space?
march 2011
on 15 june 2012, scientists at nasa reported that "voyager 1" was very close to entering interstellar space, indicated by a sharp rise in high-energy particles from outside the solar system. in september 2013, nasa announced that "voyager 1" had crossed the heliopause on august 25, 2012, making it the first spacecraft to enter interstellar space.





























in december 2018, nasa announced that "voyager 2" had crossed the heliopause on november 5, 2018, making it the second spacecraft to enter interstellar space.





























in july 2019, a new plan to better manage the two voyager space probes was proposed.





























section::::spacecraft design.
voyager program
the voyager missions (voyager 1 and voyager 2) are a part of nasa's heliophysics system observatory, sponsored by the heliophysics division of the science mission directorate at nasa headquarters in washington. the voyager spacecraft were built and continue to be operated by nasa's jet propulsion laboratory, in pasadena, calif. on december 4, 2012, eleven billion miles from earth, nasa's voyager 1 spacecraft has entered a "magnetic highway" that connects our solar system to interstellar space. the "magnetic highway" is a place in the far reaches of the solar system where the sun's magnetic field connects to the magnetic field of interstellar space. in this region, the sun's magnetic field lines are connected to interstellar magnetic field lines, allowing particles from inside the heliosphere to zip away and particles from interstellar space to zoom in. in recent years, the speed of the solar wind around voyager 1 has slowed to zero, and the intensity of the magnetic field has increased.
heliophysics science division