The farthest human-made object is now sailing through the debris of dead stars

Space · Published 12 October 2026 Swipe more like this →

In short: After decades of traveling through our solar system, NASA's Voyager 1 has officially entered the cold, quiet realm of interstellar space. It is no longer just observing our Sun's influence, but is now actively bathed in the ionized gas left behind by stars that died millions of years ago.

Launched in 1977, Voyager 1 was originally designed to study the giant planets of our outer solar system. During its primary mission, the probe achieved remarkable discoveries, such as identifying the moons Thebe and Metis around Jupiter, and finding the G-ring and five new moons at Saturn. However, its trajectory eventually led it beyond the heliosphere—the protective bubble of energetic particles and magnetic fields generated by the Sun.

In August 2012, the spacecraft crossed the heliopause, marking its transition into interstellar space. This boundary represents the point where the influence of the interstellar medium becomes stronger than the Sun's solar wind. Recent data from the mission reveals that the spacecraft is currently moving through a transitional region. While some solar effects remain evident, the probe is now detecting plasma—a type of ionized gas—that originates from the space between stars.

This interstellar plasma is composed of material ejected from the deaths of nearby stars millions of years ago. As the spacecraft continues its journey, scientists use instruments like the Magnetometer (MAG) to study these changes. By performing calibration maneuvers—spinning the spacecraft to differentiate its own magnetic field from the surrounding space—researchers have observed that the magnetic field strength, while similar in magnitude to what was seen inside the heliosphere, has lost the intense variability caused by solar activity. Despite being nearly 50 years into its mission, Voyager 1 continues to provide our first direct look into the cosmic neighborhood.

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