NASA - National Aeronautics and Space Administration

Cassini has detected a faint, partial ring orbiting with one small moon of Saturn, and has confirmed the presence of another partial ring orbiting with a second moon.

A fork-like conductivity probe has sensed humidity rising and falling beside Phoenix, but when stuck into the ground, its measurements so far indicate soil that is thoroughly and perplexingly dry.

NASA's 50th anniversary was celebrated with an all-star gathering of legendary American astronauts.