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Thermal Evolution of Lava Planets Across System Ages: Predictions for Hell of a Survey
[astro-ph.EP] Ultra-short-period (USP) rocky exoplanets can have dayside temperatures high enough to maintain permanent magma oceans, sitting at the intersection of interior geophysics and atmospheric chemistry. Coupled feedbacks between the molten surface and outgassed atmosphere can sustain or enhance a volatile envelope, while stellar interactions can erode it. Understanding which outcome prevails, and its observable…
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Thioacetaldehyde (CH3CHS) On Interstellar Ices: A Key Molecule To Unravel Two Chemical Dichotomies In The ISM
[astro-ph.GA] Thioacetaldehyde (CH3CHS), recently detected in TMC-1, has an abundance approximately 36 times lower than…
Interstellar Disparity: N- vs O-bearing Molecules: A Multidisciplinary Perspective across Interstellar Environments
[astro-ph.GA] Observations of O- and N-bearing molecules reveal systematic chemical differentiation across a wide range…
Water Cloud and Chemical Modulations in the Coldest Brown Dwarf
[astro-ph.EP] We present high signal-to-noise, medium resolution (R ~ 1000), time-series JWST/NIRSpec spectra of WISE…
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
Possible Observational Survey Strategies to Maximize Exoplanet Yields: A Report from the Survey Strategies Task Group in the Exoplanet Science Yields Working Group
[astro-ph.EP] We present a variety of possible observational sequences from planet detection to characterization (i.e., survey strategies) for the initial exoEarth detection and characterization survey phase of the Habitable Worlds Observatory. An array of survey strategies were collated by the HWO Exoplanet Survey Strategies Task Group; by investigating and comparing expected resultant exoEarth yields for…
Read moreExploration Gear & Tech
Looking Inside Living Antarctic Cells For The First Time
[British Antarctic Survey] Cambridge engineers have built the first microscope to see inside living cells in sub-zero conditions, revealing secrets of Antarctic fish survival. Editor’s…
On-demand Microfluidic Synthesis Of Silver Nanoparticles For SERS Detection Of Organic Compounds: A Preliminary Feasibility Study For Astrobiology Applications
[Spectrochimica Acta Part A] The detection of organic molecules at trace concentration levels remains a critical challenge for astrobiology research. While Raman spectroscopy is a…
Tricorder Tech: What A Spacefaring Arctic Microbe Reveals About Life in Alien Oceans
[ISS National Laboratory] It lives in places where life should not exist. In the brine channels that thread through Arctic sea ice, it survives temperatures…
Imaging & Spectroscopy
Delayed Methane Detection in 3I/ATLAS: GCR-Driven Subsurface Stratification and Interstellar Exposure Age Constraints
[astro-ph.EP] Interstellar comet 3I/ATLAS shows unusual volatile activity, including strong H2O, CO, and CO2 production and a delayed post-perihelion detection of CH4. In this work,…
Europa Smooth Plains Formation: A SPH Cryovolcanic Model
[astro-ph.EP] Cryovolcanism is a fundamental geodynamical process that has been observed on several icy moons. Europa stands out as a primary target for investigating potential…
1I/’Oumuamua-like Objects’s SFDs With Older, Current And Future Surveys
[astro-ph.EP] Interstellar Objects (ISOs) may provide direct evidence of planetesimals ejected from early-stage solar systems. Studying these objects and predicting their detection through various surveys…
Biosignatures & Paleobiology
Can AI Detect Life? Lessons From Artificial Life
[cs.LG] Modern machine learning methods have been proposed to detect life in extraterrestrial samples, drawing on their ability to distinguish biotic from abiotic samples based…
Computational Modeling Of An RNA-peptide World
[biorxiv.org] Emergence and evolution of functional RNA and protein structures are the central problems for understanding the origin of life. Although it is well known…
Is A Nearby Advanced Alien Civilization Out There Waiting To Pounce On Earth? Unlikely, Says New Study
[Northern Arizona University] Science fiction suggests that life on other planets, if it exists, is likely far more advanced than life on Earth. A recent…