VECTORPOINT

Opening your observatory…

A moon with a broken-looking belt

Landslides on Charon
NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

Processed image. Grayscale LORRI photographic view of Serenity Chasma from 14 July 2015, published with a scale bar. The original camera-image caption gives a range of 78,717 kilometres. Deposits at the canyon walls were interpreted as long run-out landslides. This is photographed terrain, not a recording of a slope collapsing or the separate rendered perspective view. Native published image: 617 × 342 pixels; zoom adds no new detail.

NASA factual/editorial media guidelines · credited mission imagery, resized to WebP; no endorsement implied

· Original image source · Image licence

Charon’s cliffs and varied terrains reward a closer pass.

World
Charon
Case date or period
Flyby observations · 13–14 July 2015

Look closer

New Horizons revealed extensive canyons and a contrast between terrains on Charon. The global view helps locate the scarps before closer images reveal the complexity of their walls.

Follow the evidence

The camera images and mosaics preserve different illumination and processing. One product overlays stereo-derived elevation in colour; areas lacking suitable data remain unmeasured. Compare cliff outlines and height information without treating the palette as surface colour.

Extension permits more than one interior history

Ross Beyer and colleagues inferred roughly one percent early global surface expansion from Charon’s tectonic features, consistent with an ancient ocean freezing. Uri Malamud, Hagai Perets and Gerald Schubert tested another route: compaction, differentiation and chemical reactions can generate contraction and expansion without requiring a vast ocean. Their thermal evolution model proposes episodes that could help form the belt. The observed fractures constrain the strain, while the cause depends on assumptions about the interior and its starting state; a canyon photograph does not reveal a buried ocean directly.

The canyon walls keep traces of collapse

Open the close camera view and follow the canyon walls into the deposits below them. Mission researchers identified long run-out landslide traces here. The still photograph preserves their shapes, rather than catching a collapse in progress. Its scale bar helps compare the deposits with nearby craters, while the global portrait locates the canyon belt. A separate publisher perspective rendering reconstructs the relief; the gallery uses the photographed terrain so the viewing geometry stays traceable.

Sources & further reading