NASA’s Voyager probe made history by becoming only the second piece of artificial spacecraft to formally leave the solar system and travel beyond it.

The second Voyager spacecraft, named Voyager 2, was launched on August 20, 1977, sixteen days before its identical twin, Voyager 1, left the solar system through the northern hemisphere.

Voyager 2 is the only spacecraft ever to have made close flybys of Uranus and Neptune because it was launched on a more extended mission.

After that, it headed into the heliosphere’s southern hemisphere.