voyager
US /ˈvɔɪ.ɪ.dʒɚ/
UK /ˈvɔɪ.ɪ.dʒɚ/

1.
a series of American unmanned scientific space probes launched by NASA in 1977 to study the outer Solar System and interstellar space
:
•
The Voyager 1 probe is the farthest human-made object from Earth.
•
The Voyager program has provided invaluable data about our solar system's outer planets.