jun 282012
 
Mars had Underground Water During its First Billion Years

  By studying rocks blasted out of impact craters, ESA’s Mars Express has found evidence that underground water persisted at depth for prolonged periods during the first billion years of the Red Planet’s existence. The large 25 km-diameter crater in the foreground has excavated rocks which have been altered by groundwater in the crust before [continue reading]

mei 202012
 
New Clues to the Geological History of Venus

  ESA’s Venus Express has been used to study the geology in a region near Venus’ equator. Using near-infrared observations collected by the Venus Monitoring Camera (VMC), scientists have found evidence that the planet’s rugged highlands are scattered with geochemically more evolved rocks, rather than the basaltic rocks of the volcanic plains. This finding is [continue reading]

mei 122012
 
The Mystery of Superwinds Solved

  Astronomers at The University of Manchester believe they have found the answer to the mystery of a powerful ‘superwind’ which causes the death of stars. Artist’s impression of the dusty wind blown by a red giant star. Credit: Anna Mayall/University of Manchester. Writing in Nature, the team of researchers used new techniques which allowed [continue reading]