![Dereddened Gaia CMD with PARSEC isochrones overplotted. Black points show Gaia DR3 stars corrected for extinction and reddening using band-specific coefficients. Solid curves show isochrones spanning ages from 1 to 13 Gyr at the reference metallicity. The dotted curves highlight 1 Gyr isochrones computed at the lower (-0.4 dex) and upper (+0.4 dex) metallicity values in the sample, illustrating the range of CMD permitted by the observed metallicity distribution. This comparison demonstrates the impact of metallicity on isochrone placement relative to the data. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Precise.png?resize=1200%2C718&ssl=1)
[astro-ph.EP] Accurate stellar ages are fundamental to interpreting the evolutionary histories of habitable zone (HZ) planets. Because stellar luminosity evolves over time, HZ boundaries migrate outward, meaning that present-day HZ […]
Stellar Cartography
![Sky maps with locations of star clusters with exoplanets and candidate objects. The upper graph is centred on the Galactic centre, while the lower one is centred on the Galactic Anticenter.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Exoplanets-in.png?resize=1200%2C719&ssl=1)
Posted inExoplanets, -moons, -comets
Exoplanets In Star Clusters
[astro-ph.EP] The field of exoplanetary research is rapidly evolving, thanks to TESS and Kepler/K2. With the latest data release, Gaia DR3, Gaia has transformed the study of star clusters.
Posted inExoplanets, -moons, -comets
Hidden Worlds: A Non-transiting Candidate Planet In The Neptunian Desert Around The Solar-type Pulsator KIC 9139163
[Astronomy & Astrophysics] Close-in substellar companions experience strong tidal and magnetic interactions with their host stars and are therefore subject to fast orbital evolution.
Posted inExoplanets, -moons, -comets
Pandora Mission Begins A Study Of Exoplanets And Their Host Stars
[NASA] Pandora, NASA’s newest exoplanet mission and the first satellite to launch through the agency’s Astrophysics Pioneers program, is now making unique observations of worlds beyond our solar system and […]
![Sunburst diagrams describing the evolution of the inner planets (top) and the outer giant planets (bottom) in the DAG simulations. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Effects-of.png?resize=1200%2C717&ssl=1)
Posted inExoplanets, -moons, -comets
Effects Of Outer Giant Planets On In Situ Formation Of Inner Super-Earths
[astro-ph.EP] Recent studies have found an observational correlation between the presence of outer giant planets and inner super-Earths, which implies that outer giants do not suppress the formation of super-Earths.
Posted inExoplanets, -moons, -comets
Finding Habitable Exoplanets with Binary Relative Astrometry: Planet Detection and Characterization with the Microarcsecond Astrometric Retrieval Algorithm (MARA)
[astro-ph.EP] Binary relative astrometry is a technique to search for rocky planets in the habitable zone of nearby binary stars using 1D relative astrometry at the microarcsecond level.
Posted inExoplanets, -moons, -comets
Astro-Hunters: Machine Learning For Exoplanet Transit Detection In TESS Photometry
[astro-ph.EP] Finding planets beyond the Solar System is now largely a data-analysis problem: photometric surveys return far more stellar light curves than can be inspected by eye, and machine learning […]
![Simulations of the external planets’ (d to h) contributions at the times of JWST observations (represented in color over the bare rocks total curve). Relative fluxes were simulated using the SPHINX spectrum at 12.8 microns. The contributions of each planet are shown in colored dotted lines and the case of all planets with thick atmospheres in dashed grey. The total phase curves correspond to the total contribution of the external planets. Eclipses are displayed but not transits. Visit 1 of GTO 1279 is not displayed as the observational strategy from this visit was different from the others and less precise (Ducrot et al. 2024) -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Looking.png?resize=1200%2C717&ssl=1)
Posted inTRAPPIST-1
Looking For TRAPPIST-1 External Planets’ Emission In JWST Archival Data
[astro-ph.EP] The TRAPPIST-1 system has been thoroughly observed with JWST. Unfortunately, stellar contamination issues strongly limit the interpretation of transit observations.
Posted inStellar Cartography
A High-Resolution Spectroscopic Survey of Directly Imaged Companion Hosts: III. Characterization of the Cold Imaged Planet Hosts AF Lep A and ε Indi A
[astro-ph.EP] JWST has enabled the measurement of carbon, oxygen, and sulfur abundances in the atmospheres of directly imaged planets. Interpretation of these abundances from a planet formation standpoint requires the […]
![Chemical abundance distributions of the Sample II planet-candidate host stars in the [Fe/H]–[Mg/Fe] plane.](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/A-chemo.png?resize=1200%2C715&ssl=1)
Posted inStellar Cartography
A Chemo-dynamical Search For Planet-candidate Hosts Of Possible Extragalactic Origin
[astro-ph.SR] To date, all known exoplanetary systems have been identified around stars currently residing in the Milky Way, whereas planets formed in external galaxies remain largely unexplored. Such systems would […]