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Sunset over Western South America
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Published April 25, 2011
The changeover between day and night is marked by the terminator, a line on Earth's surface separating the sunlit side from the darkness.
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Bassas da India in Sunglint
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Published April 18, 2011
A photograph of an uninhabited atoll in the Indian Ocean has an almost surreal quality due to varying degrees of sunglint.
Irrigation along the Shebelle River
Published April 11, 2011
The Shebelle River has its headwaters in the Ethiopian Highlands, and transports water and sediment 1,000 kilometers to the southeast across Ethiopia and into Somalia.
Two Low Pressure Systems, Northeastern Pacific
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Published April 4, 2011
In these astronaut photographs from the ISS cupola, two distinct cyclonic vortices whirl within an area of low pressure that spanned the Pacific coast from southern California to Vancouver Island.
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Central Tien Shan, China
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Published March 28, 2011
This astronaut photograph provides a view of the central Tien Shan mountains east of where the borders of China, Kyrgyzstan, and Kazakhstan meet.
Cat Island, Bahamas
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Published March 21, 2011
Once named San Salvador, the island may be where Christopher Columbus made his first landfall in the Americas.
Flooded Coast near Sendai
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Published March 15, 2011
Taken March 14, 2011, this astronaut photograph shows the Japanese coast north, of the city of Sendai, in the wake of a devastating earthquake and tsunami.