![Observed lightcurve of Atira in 𝑉 and 𝑅𝐶 bands. A scaling of +0.43 mag is applied to all 𝑅𝐶 magnitudes. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Nordic-based.png?resize=1200%2C720&ssl=1)
[astro-ph.EP] We present photometric, spectroscopic, and polarimetric observations of (163693) Atira collected on the night of 05 March 2024. A dual-band lightcurve acquired in the V and R_C filters using […]
Biosignatures & Paleobiology
Posted inAstrochemistry
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 its oxygen analog, acetaldehyde (CH3CHO). This makes the CH3CHS/CH3CHO pair the one with the largest […]
Posted inAI - Data - Apps - Cybernetics, Biochemistry & Organic Chemistry, 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 on training models using natural […]
![Schematic representation of the chemical concept explored in this work. (A) Ethanolamine (EtA, NH2CH2CH2OH), methanol (CH3OH), and water (H2O) are subjected to electron irradiation, illustrating the starting molecular components and the formation of an unresolved product inventory after energetic processing. The question mark denotes the chemically diverse products investigated by FTIR, TPD-QMS, and ESI-MS. (B) Structure of the choline cation, [(CH3)3NCH2CH2OH]+ , included as a structurally related reference for assessing methylated EtA-derived and/or choline-like spectral features. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Electron.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry
Electron Irradiation And Temperature-programmed Desorption Of Layered Ethanolamine-water-methanol Ices
[astro-ph.GA]. Ethanolamine (EtA) is a recently detected interstellar complex organic molecule and a potential precursor to more functionalised N-bearing species.
Posted inComets and Asteroids
Multiband Color Monitoring of 3I/ATLAS Through Ground-Based Relay Observations
[astro-ph.EP] We present multiband, long-baseline photometric observations of interstellar comet 3I throughout its 2025–2026 apparition using coordinated ground-based global relay observations.
![Comparison of isovalent species including sulfinothioic acid (1a, HSS(O)H) and recently detected hydrogen trioxide (trans‐/cis‐HOOOH). The calculated geometries of 1a were completed at the CCSD(T)‐F12/cc‐pVTZ‐F12 level of theory. This geometry is compared with calculated geometries of hydrogen trioxide from Bai et al. [17]. -- Agendwante Chemie via PubMed](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Interstellar-Ice.jpg?resize=1200%2C722&ssl=1)
Posted inAstrochemistry
Interstellar Ice Chemistry Yields Elusive Sulfinothioic Acid (HS(O)SH)
[Agendwante Chemie via PubMed]. Low-oxidation-state sulfur oxyacids are key yet experimentally elusive intermediates in interstellar sulfur chemistry; even the simplest member, sulfinothioic acid (HS(O)SH), has neither been detected in space […]
![Ratio maps involving the PAH7.7 feature and the F1500W synthetic photometry applied to the MRS cubes for ASPECS galaxies. The first row of panels shows the maps of the total PAH7.7 feature to the synthetic F1500W photometry. Ratios above 1 are possible because the wings of the PAH feature extend well beyond the filter (see text for details and Donnan et al. 2026b). The second row of panels is the fraction of PAH7.7 feature within the F1500W filter to the synthetic F1500W photometry. The third row of panels is the same as the second but for the fraction of continuum emission within the F1500W to the synthetic F1500W photometry -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/PAHSPECS.png?resize=1200%2C718&ssl=1)
Posted inAstrochemistry
PAHSPECS: JWST/MIRI Spectroscopy Of PAHs at Cosmic Noon
[astro-ph.GA] The physical conditions of the interstellar medium (ISM) are thought to differ greatly at high redshifts compared to local galaxies. Polycyclic aromatic hydrocarbons (PAHs) are key ISM constituents, mediating […]
Posted inOrigin & Evolution of Life
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.
Posted inBiosignatures & Paleobiology
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.
Posted inHabitable Zones
Virus-integrated Laboratory Models For Habitability Studies Of Enceladus, Europa, And Titan
[Journal of Virology]. Biogeochemical models have become critical for answering questions about the habitability of ocean worlds, especially that of early Earth.