A few nice space images I found:

Southern Patagonian Ice Field, Chile (NASA, International Space Station Science, 09/06/09)

Image by NASA’s Marshall Space Flight Center
Glacier outlet in the Southern Patagonian Ice Field of Chile is featured in this image photographed by an Expedition 20 crew member on the International Space Station. The Southern Patagonian Ice Field of Chile and Argentina hosts a spectacular array of glaciers and associated glacial features within the southern Andes Mountains. Glaciers flowing downhill on the eastern side of the mountains have outlets into several large freshwater lakes. On the western side of the mountains, glaciers release ice into the Pacific Ocean via an intricate network of fjords. Fjords are steep valleys originally cut by glaciers during periods of lower sea level that are now inundated. As glaciers flow into the fjord, ice at the front of the glacier begins to break off and form icebergs that can float out to sea — a process known as calving. This detailed photograph shows the merged outlet of Penguin Glacier and HPS 19 into a fjord carved into the snow-covered mountains of the southern Andes. The designation HPS stands for Hielo Patagonico Sur (e.g. Southern Patagonian Ice field) and is used to identify glaciers that have no other geographic name. Ice flowing into the fjord begins to break up at center, forming numerous icebergs — the largest visible in this image is approximately 2 kilometers in width. The large ice masses visible at center have a coarse granular appearance due to variable snow cover, and mixing and refreezing of ice fragments prior to floating free.

Read full caption:
spaceflight.nasa.gov/gallery/images/station/crew-20/html/…

More about the Crew Earth Observation experiment aboard the International Space Station:
www.nasa.gov/mission_pages/station/science/experiments/CE…

More about space station science:
www.nasa.gov/mission_pages/station/science/index.html

There’s a new Flickr group about Space Station Science. Please feel welcome to join! www.flickr.com/groups/stationscience/

You can also get Twitter updates whenever there’s a new image:
www.twitter.com/nasa1fan

Polar Mesospheric Clouds at Orbital Sunrise (NASA, International Space Station Science, 06/16/10)

Image by NASA’s Marshall Space Flight Center
Polar mesospheric clouds, illuminated by an orbital sunrise, are featured in this image photographed by an Expedition 24 crew member on the International Space Station. Polar mesospheric, or noctilucent ("night shining"), clouds are observed from both Earth’s surface and in orbit by crew members aboard the space station. They are called night-shining clouds as they are usually seen at twilight. Following the setting of the sun below the horizon and darkening of Earth’s surface, these high clouds are still briefly illuminated by sunlight. Occasionally the ISS orbital track becomes nearly parallel to Earth’s day/night terminator for a time, allowing polar mesospheric clouds to be visible to the crew at times other than the usual twilight due to the space station altitude. This unusual photograph shows polar mesospheric clouds illuminated by the rising, rather than setting, sun at center right. Low clouds on the horizon appear yellow and orange, while higher clouds and aerosols are illuminated a brilliant white. Polar mesospheric clouds appear as light blue ribbons extending across the top of the image. These clouds typically occur at high latitudes of both the Northern and Southern Hemispheres, and at fairly high altitudes of 76–85 kilometers (near the boundary between the mesosphere and thermosphere atmospheric layers). The ISS was located over the Greek island of Kos in the Aegean Sea (near the southwestern coastline of Turkey) when the image was taken at approximately midnight local time. The orbital complex was tracking northeastward, nearly parallel to the terminator, making it possible to observe an apparent "sunrise" located almost due north. A similar unusual alignment of the ISS orbit track, terminator position, and seasonal position of Earth’s orbit around the sun allowed for striking imagery of polar mesospheric clouds over the Southern Hemisphere earlier this year.

Image/caption credit: NASA

View original image/caption:
spaceflight.nasa.gov/gallery/images/station/crew-24/html/…

More about space station science:
www.nasa.gov/mission_pages/station/science/index.html

There’s a Flickr group about Space Station Science. Please feel welcome to join! www.flickr.com/groups/stationscience/