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Seasonal Changes in Earth’s Surface Albedo
Triggered by seasonal changes in available sunlight, about50 million square kilometers of the Earth’s land surface undergo atransition from freeze to thaw each year. Snow and ice disappear thenreturn, frozen ground softens and hardens, vegetation “greensup” and fades. Satellite sensors…
Drought in Brazil
Rio Grande do Sul, the part of Brazil in the center of this image, is one of Brazil’s richest states. Called the breadbasket of the south, the state is Brazil’s largest rice producer, second largest wheat producer, and third largest…
Eruption of Anatahan
Explosive volcanic eruptions inject gases and ash into the Earthâs atmosphere, creating hazardous conditions for passing aircraft and the potential for climate effects. By the end of April 2005, two largest explosive eruptions had occurred at Manam (Papua New Guinea)…
Lake Natron, Tanzania
Lake Natron, in Africa’s Great Rift Valley, practically sends a warning with its color. This bright red lake is the world’s most caustic body of water, but not to everything. An endemic species of fish, the alkaline tilapia, lives along…
Jericho, West Bank
Commonly known as “the oldest city in the world,” Jericho is an important historical, cultural, and political center located northwest of the Dead Sea. This astronaut photograph illustrates the city center, and the original settlement mound of Tell es-Sultan. Total…
Mammoth Cave National Park
Archaeological evidence indicates that American Indians living in the area began exploring the cave system in the late Archaic period, between 5,000 and 3,000 years ago. European settlers first found the caves in 1798.
Ivory-billed Woodpecker Habitat
Surrounded by farmland, crossed by an interstate highway, and located less than 75 miles from Arkansas’ capital and largest city, the 55,000-acre Cache River National Wildlife Refuge hardly seems wilderness enough to be harboring any secrets. But between 2004 and…
Earth’s Energy out of Balance
These maps show observed and modeled energy imbalances in the top 750 meters of the world’s oceans from 1993-2003.
Cassini Significant Events — for 04/21/05 – 04/27/05
Cassini Significant Events — for 04/21/05 – 04/27/05 April 29, 2005 (Source: JPL) The most recent spacecraft telemetry was acquired Wednesday from theGoldstone tracking station. The Cassini spacecraft is in an excellent stateof health and is operating normally. Information on…
Eruption of Anatahan
Three years have brought drastic changes to the island of Anatahan in the Northern Mariana Islands. In 2002, when the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) captured the lower image, the island was made up of two volcanoes…
Tectonic Uplift near Sumatra
The pair of massive earthquakes near Sumatra, Indonesia, in late 2004 and early 2005, have reshaped the regional landscape. Uplift has raised coastlines out of the water in some areas, while subsidence (sinking) caused the sea to move farther inland…
Cheyenne and Catarina: Breaking Records for Sailing and Storms
When the crew of the Cheyenne set out to break the round-the-world sailing record in March 2004, they would never have guessed what an unusual storm they would meet along the way.
French Quarter, New Orleans
Nestled between the Mississippi River and Lake Pontchartrain, New Orleans is a city known for its distinctive cuisine, multicultural heritage, and revolutionary music. The city was established by French fur traders in 1718 along a Native American trade route. It…
Spring Thaw, Straits of Mackinac
he Mackinac Bridge spans a stretch of water five miles wide between Michigan’s lower and upper peninsulas. The strait connects Lakes Michigan (left) and Huron (right). The bridge is a combination of pier-supported spans with a high, central suspension sector…
Hubble Celebrates 15th Anniversary with Spectacular New Images
When NASA’s Hubble Space Telescope was launched in 1990, astronomers anticipated great discoveries, ranging from finding black holes to looking back billions of years toward the beginning of time. Now, 15 years later, the versatile telescope continues to deliver exciting…
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