![JWST/NIRSpec data for LRL 11001 using the PRISM disperser (bottom, L24) and G235M/G395M (top, this work). Uncertainties of ±1 σ for the latter are plotted as the pink band. The continuum near the 3.4 µm band has S/N∼30.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/JWST-detection.png?resize=1200%2C720&ssl=1)
[astro-ph.EP] In recent studies, we have used low-resolution spectroscopy (R~100) with the James Webb Space Telescope (JWST) to uncover low-mass brown dwarfs (2-10 MJup) in the young cluster IC 348 […]
brown dwarf
Posted inBrown Dwarfs
Water Cloud and Chemical Modulations in the Coldest Brown Dwarf
[astro-ph.EP] We present high signal-to-noise, medium resolution (R ~ 1000), time-series JWST/NIRSpec spectra of WISE 0855 (265K), the coldest known brown dwarf.
Posted inAstronomy & Telescopes
Webb Reveals A Stunning Panorama Of Star Formation
[ESA] This starry view of the nearby star-forming region IC 348 is one of the largest images from the NASA/ESA/CSA James Webb Space Telescope released to the public so far.
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 inExoplanets, -moons, -comets
JWST Color Sequence Of Transiting Exoplanets And Directly Imaged Substellar Objects
[astro-ph.EP] Color-magnitude diagrams (CMDs) have been foundational across astrophysics, from galaxies and stars to brown dwarfs, and JWST now extends them to transiting exoplanets and self-luminous substellar objects at overlapping […]
![The top panel shows comparisons of the observed spectrum of JADES-GS-BD-11 (black with grey 1σ error bars) and the median retrieved spectrum for both the PH3 and non-PH3 petitRADTRANS (red and green, respectively, with 1σ central credible intervals shaded around the median). The bottom panel shows the difference between the retrieved and observed spectra, divided by the observed uncertainty. The two retrieved median spectra are generally within 1σ of each other everywhere except at 4.3 µm (the Q-branch of the PH3 feature).-- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/JWSTNIRSpec.png?resize=1200%2C717&ssl=1)
Posted inBrown Dwarfs
JWST/NIRSpec Spectra for Three Ultracool Brown Dwarfs Detected in Extragalactic Surveys: Further Evidence for Phosphine Absorption
[astro-ph.SR] We present JWST NIRSpec prism spectra for three ultracool brown dwarfs discovered in extragalactic survey data, two from the JWST Advanced Deep Extragalactic Survey (JADES), and one from Public […]
Posted inBrown Dwarfs
SMDET-1: A Nearby Y Dwarf Candidate
[astro-ph.SR] We present the discovery of SMDET-1, a red, fast-moving object (μ≈1.3″/yr) identified in time-resolved unWISE coadds using a pixel-level deep learning methodology called SMDET.
![Sky coverage of the final sample of 1341 planet-hosting stars (yellow markers) shown in Galactic coordinates overlaid on the 2MASS near-infrared map (courtesy of ESA/Gaia/DPAC). The prominent overdensity corresponds to the Kepler mission (Borucki et al. 2010) footprint. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Probing-the-origins.png?resize=1200%2C716&ssl=1)
Posted inExoplanets, -moons, -comets
Probing The Origins. III. Exoplanet Demographics Across Galactic Birth Radii
[astro-ph.GA] We quantify radial mixing in exoplanet hosts and explore links between birth environment, orbital evolution, planetary architecture, and Galactic habitability. We constructed a homogeneous catalogue by cross-matching the Encyclopaedia […]
Posted inUncategorized
NASA’s Backyard Worlds: Binaries Project
Some stars have planets. Others are orbited by brown dwarfs, balls of gas too massive to be planets, but too low-mass to be stars. Astronomers love these brown dwarf-star pairs […]
Posted inBrown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release, Stellar Cartography
A Sunlike Star Ate A Planet
A team of astronomers, led by Brooke Kotten of the University of Michigan, has shown that TOI-5882—a sun-like star located some 1,300 light-years away—has likely eaten one of its planets.