Image of the DayNASA astronaut Michael Fincke worked outside the station during the fourth and final spacewalk of the STS-134 mission, which lasted...With components of the International Space Station in the view, NASA astronauts Andrew Feustel (right) and Michael Fincke are pictured...Expedition 28 crew members-Flight Engineer Satoshi Furukawa, left, Soyuz commander Sergei Volkov, center, and Flight Engineer Mike Fossum-answer reporters' questions...Because of the absence of gravity, fuels burning in space behave very differently than they do on Earth. In this...The Soyuz TMA-20 spacecraft is seen as it lands with Expedition 27 Commander Dmitry Kondratyev and Flight Engineers Paolo Nespoli...On May 21, 2011, Iceland's Grimsvotn Volcano erupted, sending an ash plume 12 miles (20 kilometers) high and closing Keflavik...Astronaut Andrew Feustel reenters the space station after completing n 8-hour, 7-minute spacewalk at 10:12 a.m. EDT Sunday, May 22,...The newly-installed Alpha Magnetic Spectrometer-2 is visible at center of the International Space Station's starboard truss. The Alpha Magnetic Spectrometer,...Astronaut Greg Chamitoff made his way inside the station as Andrew Feustel awaited his turn at the end of the...Astronaut Drew Feustel works in the vacuum of space during the first of four spacewalks during the STS-134 mission of...This image of space shuttle Endeavour, taken by STS-134 mission specialist Ron Garan on May 19, shows the craft docked...This image of the space shuttle Endeavour's starboard wing was taken by the Expedition 27 crew during a survey of...At 5:15 a.m. EDT today, Endeavour began the nine-minute Rendezvous Pitch Maneuver, or 'backflip,' on its last visit to the...Shuttle Atlantis makes its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building at NASA's Kennedy Space...An exhaust cloud forms around Launch Pad 39A at NASA's Kennedy Space Center in Florida as space shuttle Endeavour soars...The European Space Agency's Paolo Nespoli took this image of lightning over Brazil as seen from the International Space Station...The dwarf galaxy NGC 4214 is ablaze with young stars and gas clouds. Located around 10 million light-years away in...The U.S. Army Corps of Engineers detonated explosives at the Birds Point levee near Wyatt, Missouri, at 10:02 p.m. on...STS-133 commander Steven Lindsey, far left, presents a montage to President Barack Obama as crew members Michael Barratt, pilot Eric...During its one-year mission, NASA's Wide-field Infrared Survey Explorer, or WISE, mapped the entire sky in infrared light. Among the...The Expedition 27 crew photographed this sunset over western South America from aboard the International Space Station. The station crew...European Space Agency astronaut Roberto Vittori, a member of the STS-134 crew, is pictured in the rear station of a...At NASA Kennedy Space Center's Launch Pad 39A, a technician makes his way across a platform in space shuttle Endeavour's...President Barack Obama, First Lady Michelle Obama, daughters Malia, Sasha, and the First Lady's mother Marian Robinson, are shown the...President Barack Obama, First Lady Michelle Obama, daughters Malia, left, Sasha, Mrs. Obama's mother Marian Robinson, astronaut Janet Kavandi and...The space shuttle Endeavour sat on Launch Pad 39A as a storm passed prior to the rollback of the Rotating...This waxing gibbous moon with 83 percent of the disk illuminated was photographed by retired AT&T engineer and amateur photographer...NASA Associate Administrator for Education and astronaut Leland Melvin, center, blasts off a rocket for young participants at a 'Build...The STS-134 crew arrived in T-38 jets on Tuesday, April 26, 2011, at the NASA Kennedy Space Center Shuttle Landing...STS-134 Commander Mark Kelly, center, along with his crew speaks to the media following their arrival to Kennedy Space Center,...A T-38 jet is silhouetted against the sun in flight. NASA astronauts train in the T-38s to prepare for flying...Fellow Mercury astronaut Gus Grissom (in suit) wishes Shepard good luck as he gets set to climb into his Mercury...Astronaut Alan B. Shepard, Jr. sits in his Freedom 7 Mercury capsule, ready for launch. Just 23 days earlier, Soviet...The four-member crew is at KennIn this image from 2005, NASA's Mars Exploration Rover Opportunity used its rock abrasion tool on a rock informally named...Viewed from space, the most striking feature of our planet is the water. In both liquid and frozen form, it...Like rivers of liquid water, glaciers flow downhill, with tributaries joining to form larger rivers. But where water rushes, ice...One of the fascinating aspects of viewing Earth at night is how well the lights show the distribution of people....The relatively placid view from the International Space Station belied the potent forces at work in Hurricane Earl as it...The terrain for the scientific work conducted by ICESCAPE scientists on July 4, 2010, was Arctic sea ice and melt...