Voyager was the name of two space probes launched by the USA in 1977 to study the outer planets.
Voyager I powered by its nuclear batteries reached Jupiter in 1979 and Saturn in 1980 and sent back thousands of close-up pictures of the two planets and their moons. Then it went deeper into space.
Right now it is on the edge of the solar system more than 105 billion kilometres away, making it the most distant man-made object in the universe.
No one knows where the spacecraft will eventually end up, but just in case it is found by intelligent life-forms it carries information about the earth and greetings in 55 languages.