Enormous Ice Slides on Pluto Discovered, Revealing New Planetary Dynamics

Once seen as a remote frozen orb with landscapes frozen in place, Pluto is now known to host enormous ice landslides, according to a new study published in Icarus. Images from NASA’s New Horizons spacecraft offer fresh proof that Pluto’s icy surface has been more actively shaped by gravity than scientists initially imagined.

New Horizons’ Legacy Continues to Illuminate Pluto’s Surface

Almost a decade after New Horizons flew past Pluto in 2015, researchers are still mining its data trove for groundbreaking insights. Combining high-resolution shots from the spacecraft’s Long-Range Reconnaissance Imager (LORRI) with elevation data, an international research group pinpointed six vast landslides across three impact craters. Their study in Icarus highlights unmistakable geological features bearing close resemblance to landslides documented on Earth and other celestial bodies.

These scientists found crescent-shaped collapse scars near crater edges, massive blocks of displaced ice, and wide debris fields extending across crater floors. These markers confirm that substantial frozen masses once gave way and slid downward under Pluto’s feeble gravitational pull. As the authors state,

Add Cosmo Herald as a Preferred Source

“These observations have enabled, for the first time, landslides to be recognized on one of the most prominent icy bodies in the Kuiper Belt,” marking a milestone in the geological exploration of the distant dwarf planet.

Map highlighting the sites of the landslides and close-up views of each zone: a) overall location map; b-b′) landslide LD1 in Coughlin crater; c-c′) landslides LD2 and LD3 in Giclas crater; d-d′) landslides LD4, LD5, and LD6 in an unnamed crater. Credit: Icarus (2026). DOI: 10.1016/j.icarus.2026.117210

Colossal Ice Avalanches Shaped Pluto’s Surface Features

These newly detected landslides stand out not only as Pluto’s first confirmed examples but also due to their massive proportions. The research shows the slides descended roughly 1.5 to 2.2 kilometers vertically, traveling distances as long as 14.5 kilometers along crater floors. The largest recorded landslide spanned nearly 130 square kilometers, an area comparable to a sizeable urban environment.

The landslides likely involved huge volumes of water ice mixed with rock, collapsing from the towering crater walls that have remained largely stable for billions of years. Despite Pluto’s weak gravity, the steep slopes generated enough energy to produce these dramatic downward flows. While similar processes have been observed on planets like Mars and the dwarf planet Ceres, Pluto’s rugged terrain had not yet revealed this type of geological activity. This breakthrough enriches our understanding of how icy planetary surfaces change over time.

Elevation profiles of the landslides, showing key geological structures: a) LD1; b) LD2; c) LD3; d) LD4; e) LD5; f) LD6. V.e. represents vertical exaggeration comparing elevation and distance. Profiles generated from LORRI-MVIC (∼300 m/pixel) digital elevation model (DEM). Credit: Icarus (2026). DOI: 10.1016/j.icarus.2026.117210

Pluto’s Surface Shows Active Geological Processes

This discovery builds on growing recognition that Pluto is much more geologically active than once presumed before the arrival of New Horizons. Rather than isolated incidents, these ice landslides hint at regular gravitational collapses helping to continuously reshape sections of the dwarf planet’s surface. The scientists suggest these slope failures have played a notable role in carving out Pluto’s impact craters and mountainous regions. As noted in their paper,

“The identification of landslides on the surface of Pluto indicates that gravitational slope instabilities are widespread and previously undisclosed processes that may have contributed to shaping the dwarf planet’s surface.”

This finding adds a fresh chapter to Pluto’s complex geologic narrative, alongside prior discoveries of nitrogen-ice glaciers, towering water-ice mountains, ancient tectonic features, and expansive frozen plains unlike any other seen across our solar system.

Unveiling More Geological Secrets Ahead

The six landslides confirmed so far might just be the beginning. The team also spotted several surface formations resembling landslides that could not be validated due to insufficient image clarity. Since New Horizons completed only one flyby, many regions remain less thoroughly captured than the spacecraft’s targeted hemisphere.

Future missions equipped with advanced, higher-resolution imaging and refined topographic instruments hold promise for uncovering additional ice slides and advancing knowledge of how Pluto’s icy crust transforms across long timescales. Each fresh study of the New Horizons data archive reaffirms that Pluto remains an unpredictable and geologically vibrant world in the far reaches of our solar system.