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"Short" Version: The New Horizons flyby of the Pluto-Charon system took place at a little over 14 km/sec. The images used in that mosaic include the highest resolution images that were taken during the last Pluto day up through encounter, so from about 6.8 Earth days out, through the time of closest approach. Images were taken every ~few 10° of ...


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Basically you say it yourself: The reason is in the flyby itself. One doesn't cover every part of the surface with equal resolution when just passing by. Some parts (as seen in the lower part of the image) are not covered at all if the trajectory is aligned such with respect to the rotational axis that one pole is never visible. The hemisphere facing towards ...


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