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Mercury's Caloris basin

Mercury's Caloris basin
Mercury's Caloris basin Statistical methods were applied to many images of the northern hemisphere of Mercury to classify areas on the surface according to their spectral characteristics, creating this false-color view. The enormous Caloris basin shows up as a dark orange ellipse surrounded by diffuse dark blue deposits. The southern rim is outlined by several bright orange features, many of which show evidence for past volcanic activity. NASA / JHUAPL / CIW