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Sunglint Features, Lake Erie, United States
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Published June 12, 2006
Sunglint results when the Sun’s light bounces off the water’s surface and into the satellite sensor or camera. In this astronaut photograph, taken near noon on May 28th, 2006, sunglint highlights features on the surface of Lake Erie, about 50 kilometers (30 miles) west of Cleveland, Ohio. The angular water bodies along the river are likely marinas. The main part of the image shows numerous ship wakes in the zone of partial glint around the disk of the Sun’s reflection point. The wakes radiate from the mouth of the Vermilion River, with many of them heading northwest (towards the lower-right corner) in the direction of Detroit, Michigan.
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Central Phoenix Metro Area, Arizona
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Published June 5, 2006
The Phoenix, Arizona, metropolitan area is the largest in the southwestern United States. This astronaut photograph of the central metro region includes the boundary area between three of the municipalities included in the conurbation of Phoenix: the cities of Phoenix (left), Tempe (center and lower right), and Scottsdale (upper right).
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Wave Sets and Tidal Currents, Gulf of California
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Published May 29, 2006
Sunglint (reflection of sunlight from the water surface directly back to the camera or satellite sensor) off the Gulf of California gives the water a silver-gray appearance rather than the normal azure color in this astronaut photograph. The sunglint allows us to see several active features which wouldn’t be visible otherwise. The image captures a moment in time displaying very active and complex ocean wave dynamics. In this view of Punta Perihuete, Mexico, we can see three major features: biological orman-made oils floating on the surface; the out-going tidal current; and complex wave patterns. The oils on the surface are recognizable as light-grey, curved and variable-width streamers shaped by the local winds and currents. Plankton, fish, natural oil seeps, and boats dumping their bilges are all potential sources for these oils.
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Activity at Cleveland Volcano, Aleutian Islands
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Published May 25, 2006
ISS flight engineer Jeff Williams was the first to witness and then report an eruption at this Alaskan volcano in 2006.
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Washington, D.C.
Published May 22, 2006
George Washington not only served as the namesake for the capital city of the United States, he also chose its location, perhaps envisioning the transportation possibilities that the Potomac River flowing past the site would provide. Recognizable in this image are the Capitol Building, the Washington Monument (and its shadow), and the Lincoln Memorial, along the northeast bank of the Potomac River.
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Dust and Smog in Northeast China
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Published May 15, 2006
Much of the land surface is obscured in this oblique image of the North China Plain and parts of Inner Mongolia. In this image, a mass of gray smog—mainly industrial pollution and smoke from domestic burning—obscures Beijing and surrounding cities. Numerous plumes with their source points appear within the mass. Beijing suffers some of the worst air pollution in the world from these chronic sources, and the characteristic colors and textures of the smog can be easily seen through the windows of the International Space Station. The pale brown material in Bo Hai Bay, about 300 kilometers east of Beijing, is sediment from the Yellow River and other rivers.
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Viedma Glacier, Argentina
Published May 8, 2006
The icefields of Patagonia, located at the southern end of South America, are the largest masses of ice in the temperate Southern Hemisphere (approximately 55,000 square kilometers).
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Oshigambo River and Etosha Pan, Namibia
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Published May 1, 2006
Etosha Pan in northern Namibia is a large, dry lakebed in the Kalahari Desert. The 120-kilometer-long (75-mile-long) lake and its surroundings are protected as one of Namibia’s largest wildlife parks. About 16,000 years ago, when ice sheets were melting across Northern Hemisphere land masses, a wet climate phase in southern Africa filled Etosha Lake. Today, Etosha Pan is seldom seen with even a thin sheet of water covering the salt pan. This astronaut photograph shows the point where the Oshigambo River runs into the salt lake during an unusually wet summer in southern Africa, in March 2006.
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