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The probe is now in interstellar space, the region outside the heliopause, or the bubble of energetic particles and magnetic fields from the Sun. Voyager 1 was launched after Voyager 2, but because of a faster route it exited the asteroid belt earlier than its twin, and it overtook Voyager 2 on Dec. 15, 1977.
"It's Official! Voyager 1 Spacecraft Has Left Solar System". Space.com. Archived from the original on January 18, 2016. Retrieved May 30, 2014.
In three-dimensional space, Voyager 1 is moving through a sparse region of interstellar gas and dust, far from any stars and unlikely to encounter another stellar system for tens of thousands of years. From a human perspective, Voyager 1's position is unimaginably remote. Yet from a cosmic perspective, it has barely begun its journey.
No spacecraft has gone farther than NASA's Voyager 1. Launched in 1977 to fly by Jupiter and Saturn, Voyager 1 crossed into interstellar space in August 2012 and continues to collect data. What is Voyager 1? Voyager 1 has been exploring our solar system since 1977.