PLANETOBSERVER / SCIENCE PHOTO LIBRARY PLANETOBSERVER / SCIENCE PHOTO LIBRARY
The Americas at night. Satellite image of the Earth seen at 06:00 (6am) GMT (UTC), centred on the Caribbean. City lights (yellow) show areas of dense population, particularly in North America (upper centre). Most of South America (lower right) is uninhabited, as is the Arctic (top). Image obtained using data from Landsat 5 and Landsat 7 satellites.
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