![CPD continuum flux densities at 345 GHz for different planet masses and separations. The dots mark the solar system gas giants, the directly imaged planets in PDS 70 and WISPIT 2, and candidate protoplanets in disc gaps. For comparison, the distribution of fully formed gas giants is shown (top panel). The white curves display sensitivity limits. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Planet-formation.png?resize=1200%2C717&ssl=1)
[astro-ph.IM] Giant planets are often regarded as primordial protoplanetary “architects”. Their formation and interactions with planetesimals and other planets during and after the protoplanetary disc phase are key to setting […]
gas giant
Posted inExoplanets, -moons, -comets
SOPHIE And TESS Characterization Of Fourteen TESS Objects Of Interest: Nine Planetary Systems And Five Low-mass Stellar Companions
[astro-ph.EP] We present fourteen TESS Objects of Interest (TOIs) from the SOPHIE-TESS follow-up program. Combining TESS photometry, SOPHIE radial velocities (RVs), ground-based photometry, and high-resolution imaging, we establish the nature […]
Posted inBrown Dwarfs
SPHEREx Telescope Sees Menagerie Of Brown Dwarfs
[NASA] NASA’s SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer) space telescope is shedding light on brown dwarfs, celestial objects that blur the line […]
![1 and 2-planet detectability thresholds for 4 specific configurations of planet mass and period ratios (close to and outside of resonance). The black grid points represent systems where only a single planet is detectable. Grey points show where both planets are detectable. The red line is a power law fit to the upper black contour, parametrising the 2-planet detection threshold. Similarly, the blue line is a power law fit to the lower contour and parametrises the 1-planet detection threshold. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Detecting-multiple.png?resize=1200%2C716&ssl=1)
Posted inGaia Mission
Detecting Multiple Planets In Gaia Data Using Bayesian Model Selection
[astro-ph.EP] Gaia will soon provide a census of cold giant planets. However, an astrometric signal contains the superimposed reflex motion of all companions, so planetary signals cannot be treated individually.
Posted inExoplanets, -moons, -comets
Ammonia And An Unexpected Chill Discovered On Distant Giant Planet HATS-6 b
[University of Maryland] Using the James Webb Space Telescope (JWST), a team of astronomers led by the University of Maryland identified water, methane and ammonia in the atmosphere of HATS-6 […]
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 inExoplanets, -moons, -comets
The First Complete Picture Of (Gas) Planet Formation In Action
[Max Planck Institute for Astronomy] Over the past decades, astronomers have reconstructed a fairly complete scenario for planet formation, from minute dust motes clumping together to the emergence of rocky […]
Posted inImaging & Spectroscopy
The Science Potential of Characterizing Gas Giant Exoplanets with HWO
[astro-ph.EP] With the ability to directly image Earth-like exoplanets and search their atmospheres for biosignatures, the upcoming Habitable Worlds Observatory (HWO) will also collect high signal-to-noise ratio (S/N) reflected-light photometry […]
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
The Metallicity Of Giant Exoplanets Around Low-mass Stars And How Ariel Can Help
[astro-ph.EP] Giant planets orbiting low-mass stars represent a unique population of giant planets that can be studied to constrain planet formation theory. Surveys of transiting giant exoplanets around M-dwarfs (GEMS) […]