Voyager 1 is making history again this year: It will be a full light day away from Earth

To put that distance into perspective, just remember that the Sun is only eight light minutes away. By the time light from the Sun reaches us in those eight minutes, Voyager 1 has traveled almost 49 years to reach the point from which its signal travels to us all day. That distance is about 25.9 billion kilometers, which is more than four times farther than Pluto at its farthest point.

An engineering limb that defies time

This achievement is even more impressive given the incredible engineering that allows Voyager to continue to function. For example, in 2017, NASA engineers managed to activate thrusters that had not been used since the eighties, five years after the probe crossed the heliopause. The expertise of the team from the Jet Propulsion Laboratory (JPL) came to the fore again in late 2024 and during 2025, when they managed to solve a serious problem with telemetry that threatened to end the mission, practically “hacking” the probe from a distance of billions of kilometers.

This long journey raises deeper, philosophical questions, especially about the fate of the Golden Plate – the gilded copper plate with the sounds and images of the Earth that the probe carries. The question arises whether a future civilization, if it is ever found, will appreciate the Golden Plate as a symbolic time capsule from the earliest days of the space age or just as an unusual museum specimen. Regardless of the answer, Voyager 1 is now literally the farthest “message in a bottle” humanity has ever sent.

As Voyager 1 continues its silent journey through interstellar space, measuring the density of matter between the stars, its power slowly wanes. The radioisotope thermoelectric generators that power it lose about four watts of power per year, and it is estimated that they will be silent forever by the mid-2030s. But even then, his journey will continue. As a silent ambassador of humanity, he will continue to rush through the darkness of space, carrying with him the share of of the world that created him.