NASA’s New Horizons Wakes Up From Hibernation Beyond Pluto, More Than 10 Billion Kilometers from Earth

NASA’s far-flung Pluto probe is awake and still healthy near the solar system’s edge.

10 Jul 2026, 12:38 by Tudor Tarita · ZME Science

Artist’s rendering of the New Horizons spacecraft approaching Pluto and its three moons. Credit: NASA.

Whomst has awakened the ancient one?! NASA did.

The New Horizons spacecraft has stirred from a nearly yearlong slumber almost 10 billion kilometers from Earth, at the edge of the Solar System, where sunlight is faint and commands take hours to arrive.

The probe, famous for giving humanity its first close look at Pluto in 2015, woke on June 23 after 321 days in hibernation. As it sends back nearly a year of stored measurements, scientists will use the probe to study a frontier only the Voyager spacecrafts have crossed before: the region where the solar wind slows and begins to mix with particles from interstellar space.

Nine-Hour Snooze

New Horizons caught this image of Pluto’s receding crescent as it was drifting away from the planet—200,000 kilometers away from Pluto. Credit: NASA

New Horizons entered hibernation on August 7, 2025, after NASA sent commands one month prior telling the spacecraft to power down most systems and wake in June 2026. During hibernation, the probe conserved resources while continuing to collect data, so it wasn’t exactly inert during all this time.

The spacecraft is now about 64 astronomical units from Earth, or 10 billion kilometers (6 billion miles). One astronomical unit equals the average distance between Earth and the Sun. From New Horizons, a radio signal takes roughly nine hours to reach mission control.

So far, engineers see no signs of trouble.

“Every status report through this hibernation period was ‘green,’ meaning all was well aboard New Horizons each and every week,” said Alice Bowman, the mission operations manager at the Johns Hopkins Applied Physics Laboratory, in a NASA statement.

Now awake, the spacecraft will begin sending back the data it gathered over the last 321 days and reporting on its condition in the cold dark far beyond Pluto.

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The Scale Is Wild

Composite image of Arrokoth obtained from data collected by New Horizons as it flew by the object on January 1st, 2019. Credit: NASA

New Horizons launched as a Pluto mission, and in 2015 it transformed the former ninth planet from a blurry dot into a geologically complex world.

Four years later, it flew past Arrokoth, a snowman-shaped asteroid in the Kuiper Belt, the broad ring of icy bodies beyond Neptune. Since then, it has traveled another 23 astronomical units—3.44 billion kilometers, farther than the distance between the Sun and Uranus (wild!).

NASA has not found another Kuiper Belt object that New Horizons can currently reach. So the mission has shifted toward studying the heliosphere, the region around the Sun carved out by the solar wind.

In the coming weeks, New Horizons will study hydrogen in the outer heliosphere. Scientists hope those measurements will help them understand the termination shock, the region where the solar wind slows as it meets material from interstellar space. Beyond this region, the spacecraft will start traveling effectively outside the solar system.

Only Voyager 1 and Voyager 2 have gone farther and crossed into interstellar space. As of writing this article, on July 10, 2026, Voyager 1 was about 173 astronomical units from Earth (26 billion kilometers), while Voyager 2 was about 143 astronomical units away (21.4 billion kilometers)—absolutely wild. But New Horizons carries instruments that can make more sensitive measurements of some features in this distant region.

“The data from the termination shock encounter will be a treasure trove for space physicists worldwide who are eager to understand how this vast boundary works,” Pontus Brandt, New Horizons project scientist at APL, told Space in 2025. “All these discoveries from pioneering missions like Voyager and New Horizons teach us how little we know about what lies beyond.”