Asteroids sharing their orbits with the planet Neptune have been observed to exist in a broad spectrum of red colour, implying the existence of two populations of asteroids in the […]
astrogeology
Posted inAnalog Studies, Astrogeology, Exoplanets, -moons, -comets, Status Report
Comparisons Of The Core And Mantle Compositions Of Earth Analogs From Different Terrestrial Planet Formation Scenarios
The chemical compositions of Earth’s core and mantle provide insight into the processes that led to their formation. N-body simulations, on the other hand, generally do not contain chemical information, […]
Posted inAstrochemistry, Astrogeology, Biogeochemical Cycles & Geobiology, Europa, Ganymede, Icy Worlds, Press Release
A Newly Discovered Form Of Salty Ice Could Exist On The Surface Of Icy Moons
The red streaks crisscrossing the surface of Europa, one of Jupiter’s moons, are striking. Scientists suspect it is a frozen mixture of water and salts, but its chemical signature is […]
Posted inAstrochemistry, Astrogeology, Ceres, Comets and Asteroids, Imaging & Spectroscopy, Meteorites & Asteroids, Press Release
An Unknown Class Of Water-rich Asteroids Has Been Identified
New astronomical measurements in the infrared range have led to the identification of a heretofore unknown class of asteroids
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Status Report
Takeout And Delivery: Erasing The Dusty Signature Of Late-stage Terrestrial Planet Formation
The formation of planets like Earth is expected to conclude with a series of late-stage giant impacts that generate warm dusty debris, the most anticipated visible signpost of terrestrial planet […]
Posted inAstrogeology, Exoplanets, -moons, -comets, Habitable Zones, Icy Worlds, Press Release, Water/Hycean Worlds & Oceanography
How Do Rocky Planets Really Form?
A new theory for how rocky planets form could explain the origin of so-called “super-Earths”—a class of exoplanets a few times more massive than the Earth that are the most […]
Posted inAstrogeology, Biogeochemical Cycles & Geobiology, Habitable Zones, Press Release
Sedimentary Rock Chert Records Cooling Of Earth Over Billions Of Years
Several billion years ago, the oceans were probably not as hot as often assumed, but were instead at much more moderate temperatures.
Posted inAstrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Press Release
A Catalog Of Earth’s Minerals Will Inform Models Of Life’s History And Extraterrestrial life
A 15-year study led by the Carnegie Institution for Science details the origins and diversity of every known mineral on Earth, a landmark body of work that will help reconstruct […]
Posted inAstrochemistry, Astrogeology, Meteorites & Asteroids, Press Release
Meteorite Petrology Versus Genetics: Toward A Unified Binominal Classification
The current meteorite taxonomy, a result of two centuries of meteorite research and tradition, entangles textural and genetic terms in a less than consistent fashion, with some taxa (like shergottites) […]
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Press Release
The Molecular Composition Of Shadowed Protosolar Disk Midplanes Beyond The Water Snowline
Image: Pie charts of the percentage contributions of the dominant carbon-bearing molecules to the total elemental carbon abundance (= 1.4 × 10−4 , top panels), the dominant oxygen-bearing molecules to […]