In 2012, Voyager 1 It became the first ship to reach interstellar space. Not surprisingly, he has been traveling for forty years, since he launched on September 5 as today.
This robotic probe of 722 kilos of weight, continues operating today, traveling farther and farther from us.
At a current distance of 139 astronomical units of the Sun, it is the furthest spacecraft on Earth and the only one in interstellar space, although it has not yet left the solar system, leaving it a good way to reach the Oort cloud: will enter it in approximately 300 years.
Voyager 1 is currently the object made by the most distant human on Earth, traveling at a relative speed of the Earth and the Sun greater than that of any other space probe. It obtains its electrical energy from a radioisotope thermoelectric generator, devices that use the heat energy generated by the disintegration of plutonium-238 and which will last until 2025 or 2030.