nov 172012
 
Melt Water on Mars Could Sustain Life

  Near surface water has shaped the landscape of Mars. Areas of the planet’s northern and southern hemispheres have alternately thawed and frozen in recent geologic history and comprise striking similarities to the landscape of Svalbard. This suggests that water has played a more extensive role than previously envisioned, and that environments capable of sustaining [continue reading]

mrt 222012
 
MESSENGER Provides New Look at Mercury's Landscape, Metallic Core, and Polar Shadows

Spacecraft concludes primary mission, looks toward second year at innermost planet click to enlarge   MESSENGER completed its one-year primary mission on March 17. Since moving into orbit about Mercury a little over one year ago, the spacecraft has captured nearly 100,000 images and returned data that have revealed new information about the planet, including [continue reading]