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An unpiloted ISS Progress resupply vehicle approaches the International Space Station, carrying 2,050 pounds of propellant, 110 pounds oxygen and air, 926 pounds of water and 2,778 pounds of spare parts and experiment hardware for a total of 2.9 tons of food, fuel and equipment for the residents of the space station. Photo taken on January 12, 2012. (NASA)
Russian cosmonaut Anton Shkaplerov, Expedition 30 flight engineer, participates in a session of extravehicular activity (EVA) to continue outfitting the International Space Station. During the six-hour, 15-minute spacewalk, Shkaplerov and Russian cosmonaut Oleg Kononenko (out of frame), flight engineer, moved the Strela-1 crane from the Pirs Docking Compartment to begin preparing the Pirs for its replacement next year with a new laboratory and docking module. Both spacewalkers wore Russian Orlan spacesuits bearing blue stripes and equipped with NASA helmet cameras. (NASA)
Nighttime view from the International Space Station shows the Atlantic coast of the United States in this image dated February 6, 2012. Metropolitan areas from the Virginia/Maryland/Washington, D.C., area are visible in the image that spans almost to Rhode Island. Boston is just out of frame at right. Long Island and the New York City area are visible in the lower right quadrant. Philadelphia and Pittsburgh are near the center. Parts of two Russian vehicles parked at the orbital outpost are seen in left foreground. (Reuters/NASA)
Rhea passes in front of the much larger haze-shrouded moon Titan, both in orbit around Saturn, seen by NASA's Cassini orbiter on August 25, 2011. (NASA/JPL)
A partial solar eclipse, as seen from space, on Tuesday February 21, 2012, when the Moon moved in between NASA's Solar Dynamics Observatory (SDO) satellite and the Sun, on February 22, 2012. (AP Photo/NASA)
The dancing light of the auroras on Saturn. Seen from space, an aurora appears as a ring of glowing gases circling a planet's polar region. Auroral displays are initiated when charged particles in space collide with a planet's magnetic field. The charged particles are accelerated to high energies and stream into the upper atmosphere. Collisions with the gases in the planet's atmosphere produce flashes of glowing energy in the form of visible, ultraviolet, and infrared light. Astronomers combined ultraviolet images of Saturn's southern polar region with visible-light images of the planet and its rings from both Hubble and the Cassini spacecraft to make this picture. The auroral display appears blue because of the glow of ultraviolet light. In reality, the aurora would appear red to an observer at Saturn because of the presence of glowing hydrogen in the atmosphere. This image was taken in January of 2004. More info here. (NASA, ESA, J. Clarke, Boston University, and Z. Leva, STScI)
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