![Sky-coverage of the four surveys utilized in this study, with celestial coordinates displayed. It depicts three consecutive observation sectors of TESS, labeled as i−1, i, and i+1. Each of the four TESS cameras is represented by a different color. The beginning of each sector is marked in gray at an ecliptic latitude of 6 deg. The green area indicates the observing region of the fourth camera, which begins at an ecliptic latitude of 78 deg and encompasses the entire ecliptic pole. The magenta, yellow, and grey areas depict the typical 15-day observation coverage of LSST, Pan-STARRS, and ATLAS-W68, respectively. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/1IOumuamua.png?resize=1200%2C717&ssl=1)
[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 is vital for enhancing our […]
astro-ph.EP]
![Schematic of the hierarchical configuration of the KOI-1623 system (not to scale) -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Rescuing.png?resize=1200%2C720&ssl=1)
Posted inUncategorized
Rescuing Kepler’s False Positives: A Possible Habitable Zone Exoplanet in the Triple Star System KOI-1623
[astro-ph.EP] The Kepler mission has significantly advanced our understanding of exoplanet demographics.
![The black line shows the empirical high-S/N template spectrum of Proxima Centauri (left) and Barnard’s Star (right). In the top panel, the green curve shows the median spectrum obtained by taking the median flux at each wavelength across the full grid of PHOENIX M-dwarf spectra, while the shaded region denotes the corresponding 1σ envelope. Comparing this range of model spectra with the empirical M-dwarf spectra demonstrates that the PHOENIX models do not adequately reproduce the observed spectra. The middle and bottom panels show either empirical templates or postellar spectral samples constructed from synthetic SPIRou observations of the respective stars at different S/N regimes. For the postellar spectra, the 1σ, 2σ, and 3σ intervals are shown, highlighting the uncertainties recovered on individual spectral feature. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/POSTELLAR.png?resize=1200%2C721&ssl=1)
Posted inExoplanets, -moons, -comets
POSTELLAR: Posterior Stellar Spectrum Sampling – An Alternative to Approximate Stellar Spectra for Exoplanetary Analysis
[astro-ph.EP] We present a novel approach to perform posterior sampling of the underlying stellar spectrum in high-resolution spectroscopic observations.
Posted inBarnard's Star
The Barnard’s Star Planetary System: Stability, Composition, and Evolution of Four Sub-Earth Exoplanets
Barnard’s Star is the nearest single star to the Sun (1.8 pc), and hosts four recently-discovered planets.
Posted inAI - Data - Apps - Cybernetics, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Mapping, Geodesy, Cartography, Bathymetry, Status Report
GJ 3929 b as the First Complete Rocky Worlds DDT Data Set
Despite their large abundance, it is still unknown whether and under what conditions rocky planets around M dwarf stars can host atmospheres.
Posted inIcy Worlds, Imaging & Spectroscopy, Life Support Systems, Missions & Hardware, Nanotechnology & SynBio, Status Report, Titan
Titan’s Resources and their Utilization
Saturn’s moon Titan is a unique environment in the solar system. It is the only moon with an atmosphere, composed primarily of the gases N2 and CH4. It is also […]
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Status Report
The ALMA Survey of Gas Evolution of PROtoplanetary Disks (AGE-PRO): Formaldehyde (H2CO) Emission And Its Links To Disk Properties
Protoplanetary disks are rotating structures of gas and dust surrounding young stars, serving as the birth places of planets. Understanding the chemical evolution of organic materials in these disks is […]
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Comets and Asteroids, Cryobiology, Icy Worlds, Imaging & Spectroscopy, Impact events, Mapping, Geodesy, Cartography, Bathymetry, Mercury, Status Report
Transport of Water In A Transient, Impact-Generated Atmosphere On Mercury
Mercury’s polar cold traps host water ice deposits that are likely populated with impact-delivered water via Mercury’s exosphere.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Photochemical CS2 Gas Detected On A 20-Myr-old Exoplanet
Probing the atmospheres of young exoplanets offers a powerful window into how planetary systems evolve and the physical and chemical processes that drive those early evolutions.
Posted inAI - Data - Apps - Cybernetics, Astrogeology, Atmospheres, Climate, Weather, Desert Worlds, Mapping, Geodesy, Cartography, Bathymetry, Mars, Status Report
Towards a Foundation Model for the Martian Atmosphere
The martian atmosphere hosts dynamical phenomena ranging from planet-encircling dust storms to mesoscale orographic clouds and nocturnal low-level jets.