August 2024 – Page 8 – My WordPress Site

This pair of images shows stars observed Feb. 6, 2026, by the SPARCS space telescope simultaneously in the near-ultraviolet, left, and far-ultraviolet, right. The fact that one star is seen in the far-UV while multiple are seen in near-UV offers insights into the temperatures of these stars, with the one visible in both colors being the hottest. Credit: NASA/JPL-Caltech/ASU

Biosignatures & Paleobiology, Europa, Exploration Gear & Tech, Ganymede, Icy Worlds, Imaging & Spectroscopy, Jupiter, Missions & Hardware, Moon, Tricorders & Sensors, Venus, Water/Hycean Worlds & Oceanography

Astrobiology Droid Update: Juice Rerouted To Venus After The First lunar-Earth Flyby

by Keith CowingAugust 21, 2024August 21, 2024

(Left) Predicted concretion diameter for different nucleation density scaling exponents α. For α ≤ 1, diffusion controls at the Mars dust grain size and predictions match observations (green band). For α ≥ 1.5, nucleation dominates even at 3 µm, predicting concretions well below the observed range, ruled out by the data. (Right) Crossover grain size as a function of α (log scale). Green region: diffusion-limited zone (crossover above Mars dust at 3 µm). Pink region: nucleation-limited zone. The graincontact derivation (dotted line, α = 1) sits within the diffusion-limited zone, consistent with observations. -- astro-ph.EP

Astronomy & Telescopes, SETI & Technosignatures

An Extragalactic Widefield Search For Technosignatures With The Murchison Widefield Array

by Keith CowingAugust 21, 2024August 21, 2024

Astrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones, Icy Worlds, Water/Hycean Worlds & Oceanography

Planets Contain More Water Than Previously Thought

by Keith CowingAugust 21, 2024August 21, 2024

Earth’s spectrum over time (right panel), reproduced from [11]. The biosignature gases present change dramatically from epoch to epoch (left panel), producing significantly different spectra. The simultaneous detection of O2 at 0.8 µm demonstrates the presence of life in the modern Earth spectrum shown in the bottom right panel, but for habitable planets without much evidence of oxygenic biosignatures (e.g. Proterozoic and Archean Earth), coverage beyond 0.8 µm will be key to capture H2O, and CH4 features. -- astro-ph.IM

AI - Data - Apps - Cybernetics, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Fossils & Paleontology, Genomics, Proteomics, Bioinformatics, Imaging & Spectroscopy, Nomenclature, Systematics, Natural History, Origin & Evolution of Life

Constructing the Molecular Tree of Life using Assembly Theory and Mass Spectrometry

by Keith CowingAugust 21, 2024August 21, 2024

Atmospheric conditions in the case with Sp = 0.4 S0, pN2 = 1.0 bar, pCO2 = 0.1 bar. Each case shows (a) horizontal distribution of surface temperature, (b) horizontal distribution of CO2 ice amount (c) horizontal distribution of H2O ice amount, and (d) mass streamfunction between the substellar point (SS) and antistellar point (AS) in tidally-locekd coordinate. In (a), (b), and (c), 0°of latitude and of longitude corresponds to the substellar point (SS). Note that horizontal axis in (d) represents the latitude in tidally-locked coordinate and the mass flux where the value is positive is anticlockwise circulation. -- astro-ph.EP

Astrochemistry, Astrogeology, Exoplanets, -moons, -comets, Imaging & Spectroscopy

On The Age And Metallicity Of Planet-hosting Triple Star Systems

by Keith CowingAugust 21, 2024August 21, 2024

Astrochemistry, Biochemistry & Organic Chemistry, Biophysics, Genomics, Proteomics, Bioinformatics

Self‐Replication Without Hydrogen‐Bonds: An Exobiotic Design

by Keith CowingAugust 21, 2024August 21, 2024

Ribozymes are relics of molecular life forms

Astrogeology, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets

Geodynamics Of Super-Earth GJ 486b

by Keith CowingAugust 21, 2024August 21, 2024

University of Innsbruck

Astrochemistry, Astrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy

Chemical Composition of Comets C/2021 A1 (Leonard) and C/2022 E3 (ZTF) From Radio Spectroscopy and the Abundance of HCOOH and HNCO in Comets

by Keith CowingAugust 21, 2024August 21, 2024

Lake Untersee, Antarctica and surrounding features - NASA/Google Earth

Astrochemistry, Astrogeology, Caves, Craters, Mountains & Lava Tubes, Exoplanets, -moons, -comets, Lava / magma ocean / Volcanic Worlds

LavAtmos 2.0: Incorporating Volatiles Species in Vaporization Models

by Keith CowingAugust 21, 2024August 21, 2024

Astrochemistry, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Comets and Asteroids, Impact events, Meteorites & Asteroids, Panspermia

High-pressure Torsion Processing Of Serine And Glutamic Acid: Understanding Mechanochemical Behavior Of Amino Acids Under Astronomical Impacts

by Keith CowingAugust 21, 2024August 21, 2024