Dawn arrives at Ceres: Exploration of a small, volatile-rich world.


On 6 March 2015, Dawn arrived at Ceres to find a dark, desiccated surface punctuated by small, bright areas. Parts of Ceres' surface are heavily cratered, but the largest expected craters are absent. Ceres appears gravitationally relaxed at only the longest wavelengths, implying a mechanically strong lithosphere with a weaker deep interior. Ceres' dry exterior displays hydroxylated silicates, including ammoniated clays of endogenous origin. The possibility of abundant volatiles at depth is supported by geomorphologic features such as flat crater floors with pits, lobate flows of materials, and a singular mountain that appears to be an extrusive cryovolcanic dome. On one occasion, Ceres temporarily interacted with the solar wind, producing a bow shock accelerating electrons to energies of tens of kilovolts.

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@article{Russell2016DawnAA, title={Dawn arrives at Ceres: Exploration of a small, volatile-rich world.}, author={C. T. Russell and Carol A. Raymond and Eleonora Ammannito and Debra L. Buczkowski and M C De Sanctis and Harald Hiesinger and Ralf Jaumann and Alexander S. Konopliv and H Y McSween and Andreas Nathues and Ryan S. Park and Carle M. Pieters and T H Prettyman and Thomas B. McCord and Lucy A. McFadden and S Mottola and Maria T. Zuber and Steven Joy and C . Polanskey and M. D. Rayman and Julie C. Castillo-Rogez and P J Chi and J-P Combe and Aleksandr I. Ermakov and Roger R. Fu and Martin Hoffmann and Yunlin Jia and Scott King and D. J. Lawrence and J-Y Li and Simone Marchi and F Preusker and Thomas Roatsch and Othmar Ruesch and Paul M. Schenk and Moreno Villarreal and Naoaki Yamashita}, journal={Science}, year={2016}, volume={353 6303}, pages={1008-1010} }