Trekipedia

Voyager 6

Early automated interplanetary space probe launched from Earth in the late 20th century. Upon leaving the Sol System, Voyager 6 was believed to have fallen into a black hole (though more likely a transitory wormhole) and emerged on the other side of the galaxy, near a planet of living machines, where it was transformed into the machine life-form V’ger.^[1]

References

• ^[1]ST-01: Star Trek: The Motion Picture