Browse Journal Highlights

Highlights include enriched and related content of notable journal articles presented on Eos org AGU org AGU On Demand and in AGU journals

History of Water on Mars’s Surface Is Longer Than We Thought

Terri Cook, Freelance Writer

Research Spotlight— Curiosity’s two-step heating experiment of mudstone at Gale crater reveals minerals that formed in the presence of water less than 3 billion years ago. On the basis of studies of impact crater densities on Mars’s surface, scientists have separated the Red Planet’s geologic history.... more

Seeking Salt That Surfaces from Europa’s Hidden Ocean

Sarah Stanley, Freelance Writer

Research Spotlight— Irradiation-induced color changes in sodium chloride could reveal whether it came from ocean water mixing with surface water, a key component of the moon’s potential to support life. A vast, salty ocean likely lurks beneath the smooth water ice crust of Europa, the smallest of Jupiter’s.... more

RESEARCH BOLSTERS POSSIBILITY OF PLATE TECTONICS ON EUROPA

Press Release— SUBDUCTION—THE SLIDING OF ONE TECTONIC PLATE BENEATH ANOTHER--IS POSSIBLE ON THE ICE SHELL OF JUPITER'S MOON EUROPA, A NEW STUDY SHOWS. THE PROCESS COULD SUPPLY CHEMICAL FOOD FOR LIFE TO A SUBSURFACE OCEAN.  WASHINGTON D.C. — A recent study provides new evidence that the icy shell of.... more

NASA Solves How a Jupiter Jet Stream Shifts into Reverse

Elizabeth Zubritsky

Blog— Speeding through the atmosphere high above Jupiter’s equator is an east–west jet stream that reverses course on a schedule almost as predictable as a Tokyo train’s. Now, a NASA-led team has identified which type of wave forces this jet to change direction. Similar equatorial jet streams have been.... more

Scientists discover evidence of recent water flows on Mars

Blog— Planetary scientists have discovered a rare ‘esker’ on Mars – a ridge of sediment deposited by meltwater flowing beneath a glacier in the relatively recent past (about 110 million years ago), despite cold climates. With average temperatures on Mars of -55°C, it is widely thought that glaciers.... more

A Rover’s Eye View of Moving Martian Dunes

Editors' Vox— For the first time, a landed spacecraft has investigated an otherworldly dune field. A new special issue of Journal of Geophysical Research: Planets describes the results of a several-month science investigation at the Bagnold Dunes in Gale crater, using the suite of instruments carried.... more

Choosing a Lunar Landing Site

Editors' Vox— Although engineering capability and safety are important considerations, the primary goal when choosing an optimal landing site on the Moon for a science mission is to maximize the scientific return. A research article recently published in Journal of Geophysical Research: Planets by Zhao.... more

Dawn finds possible ancient ocean remnants at Ceres

Press Release— Minerals containing water are widespread on Ceres, suggesting the dwarf planet may have had a global ocean in the past. What became of that ocean? Could Ceres still have liquid today? Two new studies from NASA’s Dawn mission shed light on these questions. In one study, the Dawn team found.... more

Model explores the long-term survival of Martian ice sheets

Editor’s Highlight—   This paper uses a numerical model of heat diffusion in the Martian subsurface to assess the survival time of mid-latitude excess ice sheets. The authors first calculated physical temperature for a three-layer stratigraphic model using numerical heat diffusion equation, and then.... more