Astronauts Patrick Forrester (left) and Steven Swanson participate in the STS-117 mission's fourth and final spacewalk. Among other tasks, Forrester…
This artist concept illustrates how a massive collision of objects perhaps as large as the planet Pluto smashed together to…
A mock-up of the Orion space capsule heads to its temporary home in a hangar at NASA's Langley Research Center…
View From Above Spirit on Mars This mosaic image taken by the navigation camera on the Mars Exploration Rover Spirit…
Workers at NASA's Lewis (now Glenn) Research Center observe as a commuter transport engine undergoes testing in the Icing Research…
Space Shuttle Discovery landed on runway 15 at Kennedy Space Center's Shuttle Landing Facility at 9:14 a.m. EDT on Monday,…
Workers position the tail cone on the Space Shuttle Discovery in preparation for its return to NASA's Kennedy Space Center…
Backdropped by the blackness of space, the Pirs docking compartment on the International Space Station was photographed by a crew…
Carrying the Expedition 12 crew, a Soyuz TMA-7 that launched a few days earlier from the Baikinour Cosmodrome in Kazakhstan…
The side of a crater surrounding the Mars Exploration Rover Opportunity at Meridiani Planum on Mars can be seen in…