The Grand Canyon is one of North America's most spectacular geologic features. Carved primarily by the Colorado River over the…
As NASA's Mars Exploration Rover Opportunity creeps farther into "Endurance Crater," the dune field on the crater floor appears even…
The massive C-19 iceberg, which broke from the Ross Ice Shelf in Antarctica in May 2002, is the long smooth…
Backdropped by the blackness of space and Earth's horizon, the docked Space Shuttle Discovery and a Soyuz spacecraft are shown…
Airglow above Earth's horizon and solar array panels add color to this scene of a portion of the International Space…
Mount Saint Helens exemplifies how Earth's topographic form can change greatly even within our lifetimes. The mountain is one of…
No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over…
STS-117 mission specialist Steven Swanson moves through a hatch in the Quest Airlock of the International Space Station as the…
Sculpted by stellar winds and radiation, these fantastic, undulating shapes lie within the stellar nursery known as M17, the Omega…
Framed by Florida greenery, Space Shuttle Discovery lifts off Launch Pad 39B at 10:39 a.m. EDT on the historic Return…
