The most distant human-made object ever built — now drifting through interstellar space beyond the Sun’s heliosphere.
The only spacecraft to visit all four giant planets, and the second to reach interstellar space.
The fastest object humans have ever built, diving repeatedly through the Sun’s corona to touch our star.
En route to Jupiter’s ocean moon Europa to investigate whether it could harbour the conditions for life.
On a twelve-year tour of the Trojan asteroids — fossils of the early Solar System locked in Jupiter’s orbit.
The first spacecraft to explore Pluto up close, now voyaging deeper into the Kuiper Belt at the Solar System’s frozen frontier.
ESA’s Jupiter Icy Moons Explorer — cruising toward Ganymede to study Jupiter’s potentially habitable ocean worlds.
All communication with deep-space spacecraft travels at the speed of light — 299,792 km per second. No matter how powerful the antenna, signals cannot travel faster. A command sent to Voyager 1 today won’t arrive for nearly a day, and its reply takes just as long to return.