![Geometry of the LTT 3780 planetary system at the time of our radio technosignature observations. The left panel shows the sky-plane (X–Y) view as seen from Earth, while the right panel shows the top-down (X–Z) view of the system. The orbits of planets b (blue) and c (green) are shown relative to the host star (yellow). Our observations from the ATA, mentioned in Table 1 on 5th November 2025, were timed to coincide with a planet–planet occultation (PPO), when planet b passes behind planet c along the line of sight, providing a unique configuration to search for radio technosignatures during mutual planetary alignment.-- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/A-Search-For.png?resize=1200%2C719&ssl=1)
[astro-ph.IM] The LTT3780 system hosts two known exoplanets-LTT3780b, a rocky super-Earth, and LTT3780c, a temperate sub-Neptune-orbiting a nearby M dwarf on opposite sides of the radius valley. LTT3780c has been […]
Technosignature
Posted inSETI & Technosignatures
Narrowband Radio Technosignature Search Toward 3I/ATLAS with FAST
[astro-ph.IM] 3I/ATLAS is the third confirmed interstellar object passing through the Solar System.
Posted inSETI & Technosignatures
Searching For Extraterrestrial Intelligence With The SKA
[astro-ph.IM] The search for technosignatures (also known as the Search for Extraterrestrial Intelligence or SETI) depends critically on our ability to distinguish artificial signals from the rich complexity of natural […]
Posted inAstropharmacy / Biotechnology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Commercial & Private Sector, Genomics, Proteomics, Bioinformatics, Habitable Zones, Microbiology & Virology, Planetary Protection & Biosafety, Press Release, Sample Return
From Microbial Dark Matter To Living Library: New Biobank Decodes Survival Secrets Of Extreme Acid Mine Drainage Microbes
Editor’s note: If we aspire to mount expeditions to new worlds and then embrace the task of characterizing and quantifying whatever life forms we find, the ability to map and […]
Posted inAI - Data - Apps - Cybernetics, Imaging & Spectroscopy, Intelligence & Language, Interstellar, SETI & Technosignatures, Status Report
Autonomous AI-Cosmoindustry and the Quiet Expansion Filter: A Threshold-Based Resolution of the Fermi Paradox
The Fermi paradox is sharpened, not weakened, by plausible extrapolations of artificial intelligence, autonomous robotics, in-situ resource utilization, orbital manufacturing, space-based computing, and uncrewed interstellar probes.
![Using spectra to distinguish a (passive) probe from a natural object. These near-IR spectra were obtained for the object classified initially as 2020 SO. These spectra show characteristics consistent with the object instead being a Centaur rocket body, leading to its identification as such. (Adapted from and reproduced with permission from “Spectral Characterization of 2020 SO,” Reddy et al., original copyright © 2001 Advanced Maui Optical and Space Surveillance Technologies Conference [AMOS], https://doi.org/10.64861/WYST9178)](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/06/Solar-System.png?resize=1200%2C712&ssl=1)
Posted inAI - Data - Apps - Cybernetics, Astronomy & Telescopes, Biosignatures & Paleobiology, Intelligence & Language, SETI & Technosignatures, Status Report
Solar System Technosignatures
While prompt-based parameter-efficient continual learning mitigates catastrophic forgetting by isolating task-specific prompts, this isolation also limits later tasks from improving earlier ones, leaving backward knowledge transfer underexplored.
Posted inAstrochemistry, Astronomy & Telescopes, Biosignatures & Paleobiology, SETI & Technosignatures, Status Report
Prospects for Astrobiology And Technosignature Searches With The Vera C. Rubin Observatory Legacy Survey Of Space And Time
The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will map sources in multiband colour–variability space.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Habitable Zones, SETI & Technosignatures, Status Report, Terraforming & Geoengineering
Exploring The Orbital Stability Of Large, Lightweight Mirrors Around Exoplanets
Extraterrestrial civilizations might place large, lightweight mirrors into orbit around an exoplanet, either to alter its climate or to provide illumination to the planet’s dark side. We previously analyzed the […]
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Intelligence & Language, Interstellar, SETI & Technosignatures, Status Report
The Ohio SETI Program — The Last Decades
The Ohio State University Radio Observatory (OSURO), known as the Big Ear, played a pivotal role in both radio astronomy and the Search for Extraterrestrial Intelligence (SETI).
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, SETI & Technosignatures, Status Report
All-Sky Ultra-Narrowband Spectral Imaging with the OVRO-LWA: Technosignature Constraints and Axion-Like Particle Prospects
We present an imaging-domain search for technosignatures at decametric wavelengths with the OVRO-LWA, targeting ultra-narrowband continuous-wave signals between 50 and 86 MHz.