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This map shows the bright lights of cities and wildfires set against the inky black backdrop of night. The image is actually a composite of satellite data collected over a number of days in April 2012 and October 2012, and is the result of 312 orbits and 2.5 TB of information. The lights seen here are not just from cities; they are also from wildifires, lightning, gas flares and reflected moonlight. Because the image is a composite of several days’ worth of data, fires and other points of light may have been picked up by the satellite and integrated into the composite image even though they were temporary, making some rural locations (such as in Australia) seem brighter than they really are on a typical day.
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Night lights, big cities
Night lights, big cities
These night-shining clouds were spotted over Billund, Denmark on July 15, 2010. These rare clouds are technically called "noctilucent" or "polar mesospheric" clouds, and form at high altitudes, 80 to 85 kilometers (50 to 53 miles) high, where the mesosphere is located. The clouds' high position in the atmosphere allows them to reflect sunlight long after the sun has dropped below the horizon. They only form when the temperature drops below –130 degrees Celsius (-200 degrees Fahrenheit), whereupon the scant amount of water high in the atmosphere freezes into ice clouds. This happens most often in countries at high northern and southern latitudes (above 50 degrees) in the summer, when the mesosphere is coldest. Studies suggest that night-shining clouds are becoming brighter and more common, which is linked to the mesosphere getting colder and more humid. These changes may be happening because of increased levels of heat-trapping greenhouse gases such as carbon dioxide and methane in the atmosphere. In the mesosphere, carbon dioxide radiates heat into space, causing cooling. More methane, on the other hand, puts more water vapor into the atmosphere, because sunlight breaks methane up into water molecules at high altitudes. Research is ongoing.
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Nocturnal Wonders
Nocturnal wonders
Curling snow drifts are magnified by the terrain around the 1,400 mile Dnieper River, flowing from Russia to the Black Sea.
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The wild, frozen Dnieper River
The wild, frozen Dnieper River
A changing landscape in the heart of Madagascar, showing drainage into the sea in the Betsiboka Estuary due to decimation of rainforests and coastal mangroves. 
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The heart of Madagascar
The heart of Madagascar
Guinea-Bissau is a small country in West Africa. Complex patterns can be seen in the shallow waters along its coastline, where silt carried by the Geba and other rivers washes out into the Atlantic Ocean. Image taken by Landsat 7 on December 1, 2000.
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GUINEA-BISSAU COAST: Guinea...
Guinea-Bissau coast
Susitna Glacier, Alaska. Like rivers of liquid water, glaciers flow downhill, with tributaries joining to form larger rivers. But where water rushes, ice crawls. As a result, glaciers gather dust and dirt, and bear long-lasting evidence of past movements. Alaska’s Susitna Glacier reveals some of its long, grinding journey in this image, taken from space on August 27, 2009. The satellite image combines infrared, red and green wavelengths to form a false-color picture. Vegetation is red and the glacier’s surface is marbled with dirt-free blue ice and dirt-coated brown ice. Infusions of relatively clean ice push in from tributaries in the north. The glacier surface appears especially complicated near the center of the image, where a tributary has pushed the ice in the main glacier slightly southward. In the lower left corner of this image, meltwater lakes can be seen on top of the ice.
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Like rivers of liquid water...
Susitna Glacier
Ephemeral Lake Carnegie, in Western Australia, fills with water only during periods of significant rainfall. In dry years, it is reduced to a muddy marsh. This image was acquired by the Landsat 7 satellite on May 19, 1999. This is a false-color composite image made using shortwave infrared, infrared and red wavelengths. The image has also been sharpened using the sensor's panchromatic band.
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Lake Carnegie
Lake Carnegie
In this image, it’s hard to get a sense of scale or of what we’re actually looking at. This picture, taken by the Landsat-5 satellite on 8 April, 1985, shows sand dunes (yellow streaks) that extend from Algeria into Mauritania in northwest Africa. These wind-blown sand ridges make up Erg Iguidi, one of the Sahara’s ‘sand seas’ in which individual dunes are often more than a third of a mile (500 meters) wide and tall.
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Sea of Sand
Sea of sand
Vivid colors and bizarre shapes come together in this artistic, fantastical image, taken from space on June 15, 2005. The labyrinth of exotic features was spotted along the edge of Russia's Chaunskaya Bay (shown by the vivid blue half circle) in northeastern Siberia. Two major rivers, the Chaun and Palyavaam, flow into the bay, which in turn opens into the Arctic Ocean. Ribbon lakes and bogs are present throughout the area, created by depressions left by receding glaciers.
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Vivid colors and bizarre sh...
Siberian ribbons
Phytoplankton bloom off western Iceland; 24 June, 2010. Taken by NASA's Aqua satellite.
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Phytoplankton bloom off wes...
Phytoplankton bloom
Captured onboard a NASA Operation IceBridge flight to survey glacier change in a warming world, this photograph shows a beach and stream in Russel Fjord, Alaska, near the terminus of Hubbard Glacier.
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Beached bergs in Alaska
Beached bergs in Alaska
In the style of Van Gogh's painting 'Starry Night,' massive congregations of greenish phytoplankton swirl in the dark water around Gotland, a Swedish island in the Baltic Sea. Phytoplankton are microscopic marine plants that form the first link in nearly all ocean food chains. Population explosions, or blooms, of phytoplankton, like the one shown here, occur when deep currents bring nutrients up to sunlit surface waters, fueling the growth and reproduction of these tiny plants. Image taken by Landsat 7 on July 13, 2005.
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VAN GOGH FROM SPACE: In the...
Van Gogh from space
This interesting image shows the world’s largest glacier, Lambert Glacier in Antarctica, and icefall that flows into it. Ice flows like water, albeit much more slowly. Cracks can be seen in this icefall as it bends and twists on its slow descent 1300 feet (400 meters) to the glacier below. The image was taken by the Landsat-7 satellite on December 2, 2000 and is a false-color composite made from infrared, red and green wavelengths. The image has also been sharpened using the sensor’s panchromatic band.
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Icefall
Icefall
This simulated natural color image shows the Coco River, between Nicaragua and Honduras, as seen from space on December 5, 2002. As it makes its way to the Caribbean Sea, the Coco River forms the border between the two countries. The coastline, known as the Mosquito Coast, is of low relief and has plentiful water bodies, relic shorelines and high temperatures. Mosquito Coast derives its name from its principal inhabitants, the Miskito Indians, whose name was corrupted into Mosquito by European settlers. The Mosquito Indians, of whom there are several tribes, are short in stature and very dark-skinned. The first European settlement in the Mosquito country started in 1630, when agents of the English-chartered Providence Company established friendly relations with the local inhabitants. The image shown covers an area of 29 x 39 kilometers (18 x 24 miles).
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This simulated natural colo...
Coco River, Nicaragua and Honduras
This image, taken on 4 July 2002, shows spiraling eddies known as von Karman vortices over Alaska’s Aleutian Islands. Such eddies form as air flows over and around objects in its path. In this case, these eddies were created when prevailing winds sweeping east across the northern Pacific Ocean encountered Alaska’s Aleutian Islands.
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Extraordinary Eddies
Extraordinary eddies
This simulated natural-color image shows the North and South Malosmadulu Atolls in the Maldives, an island republic in the northern Indian Ocean, southwest of India. The Maldives consists of a chain of almost 1200 small coral islands that are grouped into clusters of atolls. It is home to about a third of a million people. Arguably the lowest-lying country in the world, the average elevation is 1 meter (3.3 feet) above sea level. Waves triggered by the great tsunami of December 2004 spilled over sea walls to flood the capital with sandy water and then swept out just as suddenly. Residents fear this was a foreboding of disasters to come from sea level rise due to global warming. The image was taken on 22 December 2002, and covers an area of 51 x 90 kilometers (32 x 56 miles).
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The Maldives
The Maldives
Lake Chad, Africa; February 7 and 11, 2004. Once serving as part of the floor for a much larger Lake Chad, the area now known as the Bodele Depression, located at the southern edge of the Sahara Desert in north central Africa, is slowly being transformed into a desert landscape. In the mid-1960s, Lake Chad was about the size of Lake Erie. But persistent drought conditions, coupled with increased demand for freshwater for irrigation, have reduced Lake Chad to about 5 percent of its former size. As the waters receded, the silts and sediments resting on the lakebed were left to dry in the scorching African sun. The small grains of the silty sand are easily swept up by the strong wind gusts that occasionally blow over the region. Once heaved aloft, the dust can be carried for hundreds or even thousands of kilometers. The remnants of Lake Chad appear in olive-green amid the tan and light brown hues of the surrounding landscape where the countries of Chad, Niger, Nigeria and Cameroon all share borders. The Bodele Depression was the source of some very impressive dust storms that swept over West Africa and the Cape Verde Islands in February 2004, the date of this image.
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Lake Chad, Africa; February...
Lake Chad
This image, taken on January 21, 2005, shows a collision between two of the largest floating objects in the world, the Drygalski Ice Tongue and iceberg "B15-A" in Antarctica (B15-A is on the right). The 43-mile- (70-kilometer-) long Drygalski Ice Tongue juts out from the icy land of Antarctica into McMurdo Sound like a pier, and is a floating extension of the land-based David Glacier. B15-A, 75 miles (120 kilometers) long, had been drifting slowly towards Drygalski for months before this image was taken. The presence of B15-A complicated supply trips to the nearby McMurdo science base and endangered penguins in the area by blocking their access to open sea. The perspective we get from space allows us to see the scale and scope of changes to these massive bodies of ice that we could not see in any other way.
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Drygalski Ice Tongue, Antar...
Drygalski Ice Tongue, Antarctica
Bombetoka Bay in northwestern Madagascar is an inlet of Mozambique Channel, and is at the mouth of the Betsiboka River. Just downstream is the second largest port of Madagascar, the town of Mahajanga, a road terminus and trade center that exports sugar, coffee, spices, cassava, vegetable oils, timber and vanilla. The surrounding area abounds in extensive coffee plantations. Simulated natural color image taken by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on August 23, 2000.
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BOMBETOKA BAY: Bombetoka Ba...
Bombetoka Bay
Earth and its Moon are nicely framed in this image taken from the aft windows of the Space Shuttle Discovery in 1998. Discovery, on mission STS-95, was flying over the Atlantic Ocean at the time this image was taken.
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MOON FRAME: Earth and its M...
Moon frame
This photo, taken on January 22, 2001 by the Landsat-7 satellite, shows Akpatok Island, which lies in Ungava Bay in Canada. Accessible only by air, Akpatok Island rises out of the water as sheer cliffs that soar 500 to 800 feet (150 to 243 meters) above the sea surface. The island is an important sanctuary for cliff-nesting seabirds. Numerous ice floes around the island attract walruses and whales, making Akpatok a traditional hunting ground for native Inuit people.
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Akpatok Island
Akpatok Island
In this image, we see blue silt off the southern coast of Louisiana as the Mississippi River flows off into the Gulf of Mexico. The brightness and shade of blue depends on the density of the silt and the depth of the silt-carrying currents in the water. The small bright dots in the scene are fishing boats and oil platforms.
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In this image, we see blue ...
Louisiana silt
Every summer, phytoplankton spread across the North Atlantic, with blooms spanning hundreds and sometimes thousands of miles. Blooms off Scandinavia seem to be particularly intense in summer 2018.
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A vortex of lighter green p...
Summer blooms in the Baltic
The sun sets over NASA's Kennedy Space Center in Florida, on October 13, 2010.
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Vivid Sunset
Vivid sunset
This iconic image speaks volumes. To many it underscores the vastness of space, the loneliness of the cosmos and how fragile our home planet really is. Entitled “Earthrise,” it was taken by astronaut William Anders during an orbit of the moon as part of the Apollo 8 mission. Apollo 8 was the first manned mission to the moon, which entered the Moon’s orbit on Christmas Eve 1968. That evening, the astronauts onboard held a live broadcast, in which they showed pictures of the Earth and moon as seen from their spacecraft. Command Module Pilot Jim Lovell said, "The vast loneliness is awe-inspiring and it makes you realize just what you have back there on Earth." The astronauts ended the broadcast with the crew taking turns reading from the book of Genesis.
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Earthrise
Image: Earthrise

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