On January 11th, NASA’s Cassini spacecraft captured this image of Dione rising behind Saturn’s rings over the limb of Rhea, from 37,000 miles above the moon. Dione’s trailing hemisphere is riven by huge, brilliant tectonic fractures in its icy surface known as chasmata.

Italian-French astronomer Giovanni Domenico Cassini discovered both Saturnian moons in 1687 from an observatory in Paris (image credit: NASA/JPL/SSI/color composite Gordan Ugarkovic).