![Post-processed NIRCam images for the two epochs, with 1- and 2-σ contours of the expected position, computed with the posteriors of the Octofitter results: in white without including the images in the fit, and in green including the images, but without making a connection between flux and atmospheric model. The postprocessing method is described in Sec. 2.3. When including the images, some walkers tend towards the feature whose location coincides with the expected position of planet b. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/An-Updated.png?resize=1200%2C719&ssl=1)
[astro-ph.EP] Epsilon Eridani b, the nearest known Jupiter analog, has its orbit and mass constrained from radial velocity (RV) and absolute astrometry, and its atmosphere from JWST/NIRCam imaging upper limits […]
Imaging & Spectroscopy
Posted inExoplanets, -moons, -comets
Youngest Exoplanet Yet Discovered Found Hiding in Keck Observatory Data
[W.M.Keck Observatory] Astronomers have confirmed the youngest exoplanet detected so far, offering a rare glimpse into the earliest stages of planetary formation. The planet, known as Elias 2-24 b, is […]
Posted inBrown Dwarfs
Decoding The Weather On Brown Dwarf SIMP 0136
[Trinity College Dublin] Scientists from Trinity College Dublin have developed a powerful way to unravel the changing weather patterns on distant worlds.
Posted inAstrochemistry
Glycine In The Interstellar Medium Revisited: Resolving Conformational Complexity Kinetically
[astro-ph.GA] Numerous attempts to detect glycine, a simple amino acid and a key building block of proteins in all life on Earth, in the interstellar medium have so far been […]
![Binding energies of CO, CO2 and NH3 on pristine and cavity-containing ice clusters consisting of 100 and 97 H2O molecules, respectively. The error bars represent the spread in adsorption energies across the three clusters. Dispersion energy as fraction of the total binding energy per species, site and functional. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/How-Small.png?resize=1200%2C719&ssl=1)
Posted inAstrochemistry
How Small is Large Enough? Determining Minimal Cluster Sizes for Molecule Adsorption on Interstellar Amorphous Ice
[astro-ph.GA] Binding energies of molecules on ice mantles are important to understand the evolution of molecular complexity in molecular clouds.
![Overview of the gas-phase oxygen and carbon chemistry in hydrogen-dominated planetary atmospheres.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/The-atomic.png?resize=1200%2C719&ssl=1)
Posted inExoplanets, -moons, -comets
The Atomic C/O Ratio Of Exoplanet KELT-9b
[astro-ph.EP] The carbon-to-oxygen (C/O) ratio of a giant planet’s atmosphere has long been theorised to hold compositional information that can be traced back to its formation history.
Posted inCeres
Spectral Evolution Of Ceres’ Surface and Implications For Space Weathering
[astro-ph.EP] The surface of Ceres exposed to the space environment will be gradually altered, but the evolution of its spectral properties remains poorly understood. Here we analyze visible and infrared […]
Posted inAstronomy & Telescopes
Photonic Integrated Circuits for the Habitable Worlds Observatory: Science Drivers, Material Platforms, Arrayed-Waveguide Spectrographs, and a Space-Qualification Roadmap
[astro-ph.IM] NASA’s Habitable Worlds Observatory (HWO) will require ultraviolet, optical, and near-infrared instruments that are simultaneously compact, mechanically and thermally stable, high-throughput, and replicable at large channel counts.
![Temporal evolution of selected species and D/H ratios during the cloud (top panels) and core stages (lower panels). Panels (a) and (e) show the abundances of selected species during the cloud and core stages, respectively. Solid, dashed, and dotted lines denote models with Z = 1, 0.5, and 0.2, respectively. The remaining panels show the temporal evolution of the D/H ratios and the H2 OPR for Z = 1 (b, f), Z = 0.5 (c, g), and Z = 0.2 (d, h). In all panels, time is normalized by τfreeze for the corresponding density and metallicity. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/High-water.png?resize=1200%2C719&ssl=1)
Posted inAstrochemistry
High Water D/H Ratio of the Interstellar object 3I/ATLAS is Consistent With a Low-metallicity Origin
[astro-ph.EP] Recent JWST observations have revealed unusually high 12C/13C ratios in carbon-bearing molecules of the interstellar object 3I/ATLAS, consistent with formation in a lower-metallicity environment than the present-day local interstellar […]
![Illustration of the astro-calibration method. The four reference frames are represented. The three models (s, a, and c) that link them and constitute the parameter vector x are also represented. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Calibrations.png?resize=1200%2C714&ssl=1)
Posted inAstronomy & Telescopes
Calibrations For High Precision Differential Astrometry Onboard Theia And HWO
[astro-ph.IM] Future space astrometry missions such as Theia and an astrometric mode of the Habitable Worlds Observatory (HWO) require detector calibration and instrumental characterization at an unprecedented level to achieve […]