Last week, NASA released pictures of Styx, the smallest and faintest of Pluto's five moons. The moon is only about 4.5 miles long and 3 miles across. Its brightness suggests a highly reflective, icy surface similar to ones found on Nix and Hydra, two other moons. The powerful Long Range Reconnaissance Imager (LORRI) camera was 391,000 miles away when it took photos but at that distance, it was difficult to detect details on Styx's surface.
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