
Expedition 35 Flight Engineers Chris Cassidy (pictured) and Tom Marshburn (out of frame) completed a spacewalk at 2:14 p.m. EDT…

This image shows the fifth of five broad channels on Mercury for which names were recently approved. The valleys are…

This image shows the fourth of five broad channels on Mercury for which names were recently approved. The valleys are…

This image shows the third of five broad channels on Mercury for which names were recently approved. The valleys are…

Expedition 35 Flight Engineers Chris Cassidy (pictured) and Tom Marshburn (out of frame) completed a space walk at 2:14 p.m.…

NASA’s new Earth-bound rover began testing on the Greenland ice sheet this week. GROVER, which stands for both Greenland Rover…

On May 10, 2013, the sun experienced what’s called an annular eclipse – when the moon moves directly in front…

This map shows the location of “Cumberland,” the second rock-drilling target for NASA’s Mars rover Curiosity, in relation to the…

This patch of bedrock, called “Cumberland,” has been selected as the second target for drilling by NASA’s Mars rover Curiosity.…

The sun is about to come up over the South Pacific Ocean in this colorful scene photographed by one of…