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GRaND results at Ceres

GRaND results at Ceres
GRaND results at Ceres This map, centered over the northern hemisphere, uses color to depict the rate at which GRaND detected neutrons of a particular energy from an altitude of 240 miles (385 kilometers). (The underlying image of Ceres is based on pictures Dawn took with its camera at a higher altitude.) Red indicates more neutrons than blue. The relative deficiency of neutrons near the north pole (and near the south pole, although not shown here) is because hydrogen is more abundant there. The hydrogen atoms rob the neutrons of energy, so GRaND does not find as many at the special energy used for this study. (It does find them at other energies.) Full image and caption. NASA / JPL-Caltech / UCLA / MPS / DLR / IDA / PSI