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Last-minute holiday cards from the European Space Agency. Or, if you're not a card-sender: Pretty pictures!!!

Credit: ESA
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False-color radar imagery shows the Ganges Delta in Bangladesh, as seen by the European Space Agency's Envisat satellite in 2009. Standard radar images do not detect color. In this case, readings from three different satellite passes were analyzed, and the different colors reflect the surface variations that occurred between those passes.
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