jul 112013
 
How the Early Earth Kept Warm Enough to Support Life

  Solving the “faint young Sun paradox” — explaining how the early Earth was warm and habitable for life beginning more than 3 billion years ago even though the Sun was 20 percent dimmer than today — may not be as difficult as believed, says a new University of Colorado Boulder study. An artist’s conception [continue reading]

sep 092012
 
Mars's Dramatic Climate Variations are Driven by the Sun

  On Mars’s poles there are ice caps of ice and dust with layers that reflect to past climate variations on Mars. Researchers from the Niels Bohr Institute have related the layers in the ice cap on Mars’s north pole to variations in solar insolation on Mars, thus established the first dated climate history for [continue reading]

jun 212012
 
The Size of Martian 'Snowflakes' Calculated

  Mars’ carbon dioxide ‘snowflakes’ are about the size of red blood cells. Researchers have determined the size of CO2 snow particles on Mars, depicted in this artist’s rendering as a mist or fog that eventually settles to the surface as carbon dioxide snow. Image credit: NASA, Christine Daniloff/MIT News In the dead of a Martian [continue reading]

jun 072012
 
Climate Changes on Mars?

  The High Resolution Stereo Camera (HRSC) recently acquired images of two adjacent craters with very different characteristics in the Arabia Terra region on Mars. The Danielson Crater (with a diameter of approximately 60 km) is characterised by a variety of features referred to as ‘Yardangs’, while the smaller Kalocsa Crater (with a diameter of [continue reading]

mei 182012
 
Curiosity Mission To Determine Climate Change And Life On Mars

  Climate change on Earth is always a big topic. Climate change on Mars could be even bigger.   NASA’s top scientists – including a Texas A&M University researcher – hope to find out how Mars’ climate has evolved over billions of years, and answers could come soon in the mission involving Curiosity, a Volkswagen-sized [continue reading]

mei 042012
 
Mars: Former lakes and rivers - a place for microorganisms?

  Former crater lakes and dendritic river valleys in Acidalia Planitia – a place for microorganisms? Perspective view from the southeast to the northwest over Acidalia Planitia The images from the High Resolution Stereo Camera (HRSC), carried on board ESA’s Mars Express spacecraft and operated by the German Aerospace Center (Deutsches Zentrum für Luft- und [continue reading]