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Europe at night, satellite image. North is at top. The illuminations mark heavily populated areas with a high intensity of light emissions. Western Europe and the British Isles are clearly visible. The capital cities of London, Paris, Brussels and Madrid can be seen as especially bright areas. Russia's capital city Moscow is visible just east of centre. This is a composite of images taken as part of the Defense Satellite Meteorological Program (DMSP) in 2001. (KEYSTONE/SPL/NOAA)