Spacecraft
Voyager 2
The only spacecraft to have visited all four giant planets (Jupiter 1979, Saturn 1981, Uranus 1986, Neptune 1989). It crossed the heliopause in 2018 and is in interstellar space in the southern ecliptic hemisphere.
| Type | Spacecraft |
|---|---|
| Parent body | Sun |
| Launch | 20 August 1977 (Titan IIIE) |
| Agency | NASA / JPL |
| Status | Active – interstellar space |
| Signal delay | ~19 hours (one way) |