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  Oxygen Detected in Atmosphere of Saturn's Moon Dione: Discovery Could Mean Ingredients for Life Are Abundant on Icy Space Bodies

  March 2, 2012 — An international research team has discovered molecular oxygen ions (O₂+) in the upper-most atmosphere of Dione, one of the 62 known moons orbiting the ringed planet. The research was made ... > full story

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  • Cassini Detects Hint of Fresh Air at Dione
• Solar System
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  Analyses of a Tiny Comet Grain Dates Jupiter's Formation

  March 1, 2012 — Particles from comet 81P/Wild 2 brought to Earth in 2006 by NASA's Stardust spacecraft indicate that Jupiter formed more than three million years after the formation of the first solids in our Solar ... > full story
• Nebulae
  Sun
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  New Model Provides Different Take on Planetary Accretion: Collapse May Take Place in 3-D Cold Dust Cloud

  February 29, 2012 — The prevailing model for planetary accretion assumes that the solar system's planets formed in an extremely hot, two-dimensional disk of gas and dust, post-dating the sun. Scientists now propose a ... > full story
• Saturn
  Space Exploration
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  The Many Moods of Titan

  February 24, 2012 — A set of recent papers, many of which draw on data from NASA's Cassini spacecraft, reveal new details in the emerging picture of how Saturn's moon Titan shifts with the seasons and even throughout ... > full story
• Geology
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  Building Blocks of Early Earth Survived Collision That Created Moon

  February 18, 2012 — Unexpected new findings by geochemists show that some portions of the Earth's mantle (the rocky layer between Earth's metallic core and crust) formed when the planet was much smaller than it is now, ... > full story
• Space Missions
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  Mars Science Laboratory Computer Issue Resolved

  February 9, 2012 — Engineers have found the root cause of a computer reset that occurred two months ago on NASA's Mars Science Laboratory and have determined how to correct ... > full story
• Mars
  NASA
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  Mars-Bound NASA Rover Carries Coin for Camera Checkup

  February 9, 2012 — The camera at the end of the robotic arm on NASA's Mars rover Curiosity has its own calibration target, a smartphone-size plaque that looks like an eye chart supplemented with color chips and an ... > full story
• Mars
  NASA
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  New Views Show Old NASA Mars Landers

  February 9, 2012 — The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter recorded a scene on Jan. 29, 2012, that includes the first color image from orbit showing the ... > full story
• Mars
  Space Missions
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  Mars Express Radar Yields Strong Evidence of Ocean That Once Covered Part of Red Planet

  February 7, 2012 — ESA's Mars Express has returned strong evidence for an ocean once covering part of Mars. Using radar, it has detected sediments reminiscent of an ocean floor within the boundaries of previously ... > full story
• Mars
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  Space Missions
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  Surface of Mars an Unlikely Place for Life After 600-Million-Year Drought, Say Scientists

  February 3, 2012 — Mars may have been arid for more than 600 million years, making it too hostile for any life to survive on the planet’s surface, according to researchers who have been carrying out the ... > full story

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