Pluto's largest moon likely fractured by sub-surface ocean: NASA
Yahoo News - 12 months
Images from the New Horizon space probe suggest that Pluto's moon Charon once had a sub-surface ocean that has since frozen and expanded, causing the surface to stretch and fracture, NASA said Friday. Charon's surface was photographed by the New Horizons' Lorri (Long-Range Reconnaissance Imager) camera as the spacecraft flew past the moon in July 2015 at a distance of 48,900 miles (78,700 kilometers). The detailed pictures show a system of "pull-apart" tectonic faults on the moon's equator.
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