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Planetesimal Formation Across the Stellar Mass Spectrum and its Influence on Exoplanet-Inherited Volatile Budgets
[astro-ph.EP] Protoplanetary discs emerging from collapsing molecular clouds are capable of forming planetesimals at the water snowline during both the cloud collapse and Class II disc phases; such a scenario could be responsible for creating the carbonaceous/non-carbonaceous (CC/NC) heterogeneity observed in the Solar System, and bears important implications for emergent planetary compositions. We use 1D…
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Astronaut Training For Underground Science Expeditions
ESA CAVES (Cooperative Adventure for Valuing and Exercising human behaviour and performance Skills) is an…
Achieving Efficient Broadband Spatial Filtering For LIFE: Status And Plan
[astro-ph.IM] Nulling interferometry is one of the most promising techniques that is envisioned for the…
A Comprehensive Study Of Comet 67P/Churyumov-Gerasimenko In The 2021/2022 Apparition. II. Colorimetry, Polarimetry, Modeling
[astro-ph.EP] This paper presents the second part of our multi-technique observational study of comet 67P…
Anharmonic Infrared Emission Of Cyano-Substituted Polycyclic Aromatic Hydrocarbon Molecules: Cyanonaphthalenes As A Case Study
[astro-ph.GA] Recent detections of cyano-substituted polycyclic aromatic hydrocarbons (cyano-PAHs) highlight them as key tracers of…
The Polana-Eulalia Complex with JWST NIRSpec: Connections to Bennu, Ryugu, and Outer Solar System Bodies
[astro-ph.EP] Carbon rich [C complex] asteroids provide insight into the early Solar System, and families…
Earth As A Potential Source Of Llife For Europa’s Subsurface Ocean
The paper discusses the possibility of dust particles containing living bacteria ejected from Earth reaching Europa and landing on its surface. It is shown that, taking certain factors into account, over a period of 30 − 80 Myr (the estimated age of Europa’s ocean), Jupiter’s moon would have been impacted…
Keep readingDust To Dust: Prospects For Passive Technosignatures As Relics Of ETI
Technological societies are separated in time, not just space — that is the lesson of the Drake equation. Might the best way to seek them be to find technosignatures that persist long after their creators? I present work I and my collaborators have done on the idea of passive technosignatures,…
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Atmospheres, Climate, Weather
Triassic Inferno: Fires Raged Across Europe For thousands Of Years During Past Global Warming
[Utrecht University] The end-Triassic mass extinction, 201 million years ago, is linked to volcanism that resulted from the break-up of Pangea and which pumped out vast amounts of CO2 into the atmosphere causing extreme global warming of 5 to 10 degrees Celsius. As a result, tree-dominated vegetation collapsed and the highly disturbed landscapes were colonized…
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NASA SMD ROSES-25 Amendment 65: New Opportunity: C.4 Planetary Science Enabling Facilities
C.4 The Planetary Science Enabling Facilities (PSEF) program element solicits proposals for experimental and analytical research facilities to be made available to the community that does…
A Pressure-Supported Pneumatic Architecture for Robust Deep Drilling on Mars: Performance Modeling, Sizing, and Mission Integration.
[Astrobiology] Accessing the martian deep subsurface is a long-standing scientific priority for astrobiology, climate reconstruction, and planetary evolution, yet robotic drilling missions have historically been…
Mineral Biosignature Identification From Raman Spectroscopy Using Machine Learning
[PNAS] Biosignature detection remains a key challenge in astrobiology, yet robust mineral biosignatures remain limited. Raman spectroscopy is increasingly applied in planetary exploration, but its…
Imaging & Spectroscopy
Mars Express And Psyche Same Day Imagery of Mars
[ESA] On 15 May, whilst en route to a metallic asteroid, NASA’s Psyche mission flew just 4500 km above the surface of Mars. It was…
Planet-wide, Concentric Density Waves in Venus’s Upper Atmosphere Revealed through Polarimetry?
[astro-ph.EP] We report observations of faint (10−6), concentric, planet-wide rings in the polarized flux of sunlight that is reflected by Venus, obtained during a serendipitous,…
Molecule-dependent Abundance Behavior of Oxygen-bearing Complex Organics in High-Mass Star-Forming Regions: A Uniform 50-source Survey
[astro-ph.GA] We present a uniform IRAM-30m survey analysis of four oxygen-bearing complex organic molecules (COMs), methanol (CH3OH), acetaldehyde (CH3CHO), methyl formate (CH3OCHO), and dimethyl ether…
Biosignatures & Paleobiology
Tryptophan Became Part Of The Universal Genetic Code Post-LUCA
[biorxiv.org] We evaluate whether tryptophan (W), widely thought to be the last of the 20 canonical amino acids added to the genetic code, was already…
A Dual-Burst Geometrical Prescription For Concurrent Signaling
[astro-ph.IM] We propose a dual-burst implementation of concurrent signaling for technosignature searches. Concurrent signaling is a Schelling-point prescription for implicit coordination between transmitters and receivers…
ALMA Central Molecular Zone Exploration Survey (ACES) I: Overview
[astro-ph.GA] The mass flows and energy cycles within the inner regions of galaxies exert a powerful influence on the evolution of the galaxy population. The…