okt 152012
 
Solar Wind Delivers Water to the Moon and other Solar System Bodies

  Three years ago University of Tennessee, Knoxville, researchers helped to discover water on the surface of the Moon. Now, they are piecing together the origin of that water: solar wind. This microscope image shows a grain of agglutinate glass similar to those analyzed in the lunar surface-water study reported in Nature Geoscience. The specimen [continue reading]

mei 312012
 
Methane On Mars Does Not Indicate Life

Intense UV radiation on the red planet releases methane from organic materials which meteorites transport onto its surface. Methane concentration on Mars: The graphics shows the calculated methane concentrations in parts per billion (ppb) on Mars during the summer in the northern hemisphere. Violet and blue indicate small methane, red areas indicate large amounts. Credit: [continue reading]