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Photo and caption courtesy of NASA
 
The Central Sahara Desert in Africa
Gemini 11 photograph of the central Sahara Desert in Africa. The countries of Libya, Chad, Niger, Sudan, and Algeria are visible in this image. The Marzuq Sand Sea is just right of center. Just to the upper right of this is the dark, 300 by 150 km Al Haruj al Aswad volcanic field. The volcanic Tibesti mountains are at the lower right. The Gulf of Sidra is at the upper right, and the Hamada de Tinrhert mountains are at the upper left. North is at about 11:00. The image covers almost 2.5 million square km (1 million square miles).
 
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