carbonaceous grains
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Status Report

Redistribution of Ices Between Grain Populations in Protostellar Envelopes. Only the Coldest Grains Get Ices

by Keith Cowing

Context. Matter that falls onto a protoplanetary disk (PPD) from a protostellar envelope is heated before it cools again. This induces sublimation and subsequent re-adsorption of ices that accumulated during […]

Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy, Meteorites & Asteroids, Missions & Hardware, Origin & Evolution of Life, Panspermia, Sample Return, Status Report

Variations Of Organic Functional Chemistry In Carbonaceous Matter From The Asteroid 162173 Ryugu

by Keith Cowing

Primordial carbon delivered to the early earth by asteroids and meteorites provided a diverse source of extraterrestrial organics from pre-existing simple organic compounds, complex solar-irradiated macromolecules, and macromolecules from extended […]

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