![[LEFT:] A Rare Brown Dwarf: HIP 71618 B [RIGHT:] A New Giant Planet: HIP 54515 b -- W. M. Keck Observatory and the Subaru Telescope.](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/12/Discoveries-From-Maunakea-Reveal-1.png?resize=1200%2C720&ssl=1)
Astronomers using W. M. Keck Observatory and the Subaru Telescope on Maunakea, Hawaiʻi Island have discovered a massive planet and a brown dwarf orbiting distant stars—two rare companions that deepen […]
Brown Dwarfs
Posted inAI - Data - Apps - Cybernetics, Astronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
First Results From The Subaru Telescope’s OASIS Survey: Direct Imaging Of New Worlds Around Unexplored Stars
The discovery of two remarkable substellar companions orbiting distant stars has been announced by an international team of astronomers using the Subaru Telescope’s sharp adaptive-optics imaging together with precision stellar […]
Posted inAtmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Press Release
Efficiency of Hydrodynamic Atmospheric Escape in Hot Jupiters and Super Earths
We develop a flexible one-dimensional code to model the escape of hydrogen and helium from a hot Jupiter as a result of photoionization from extreme-ultraviolet (EUV) radiation.
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
Sensitivity to Sub-Io-sized Exosatellite Transits In The MIRI LRS Lightcurve Of The Nearest Substellar Worlds
JWST’s unprecedented sensitivity enables precise spectrophotometric monitoring of substellar worlds, revealing atmospheric variability driven by mechanisms operating across different pressure levels.
![Maps of average lensing parameters of simulated microlensing events due to different BFFPs over the 2D space log10[s(AU)]−log10[Mtot(M⊕)]. Here, Fi and Fw are fractions of simulated microlensing events due to BFFPs with intermediate and wide caustic topologies, respectively. ρ? shows the source radius projected on the lens plane and normalized to the Einstein radius, Lc is a length scale for caustic curves, ∆c represents the caustic area, τ is a time scale for microlensing events due to BFFPs, and P is the orbital period of binary lenses. -- Monthly Notices of the Royal Astronomical Society](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/10/On-the-Detection-of-Binary-Free-Floating-Planets.png?resize=1200%2C720&ssl=1)
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
On the Detection of Binary Free-Floating Planets in the Roman Galactic Exoplanet Survey
The recent discovery of 40 binary Jupiter-mass free-floating planets in the Trapezium cluster by the James Webb Space Telescope (Pearson & McCaughrean 2023) has opened new windows and questions in […]
Posted inAstrochemistry, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Brown Dwarfs, Imaging & Spectroscopy, Press Release, Venus
Detection of Phosphine In A Brown Dwarf Atmosphere Raises More Questions
Phosphorus is one of six key elements necessary for life on Earth. When combined with hydrogen, phosphorus forms the molecule phosphine (PH3), an explosive, highly toxic gas. Found in the […]
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Gas Giants, Imaging & Spectroscopy, Status Report
MINDS. Cha Ha 1, A Brown Dwarf With A hydrocarbon-rich Disk
Context. Recent JWST observations have shown that brown dwarfs (BD) are chemically rich, offering valuable insights into giant planet formation.
Posted inAstrogeology, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Ice Giant, Nomenclature, Systematics, Natural History, Status Report
(Re)-Defining Planets — the Fundamental Plane of Planets
6000+ exoplanets are now detected using various techniques, with estimates of billions of planets existing in our Galaxy alone.
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Status Report
Multiplicity Of Young Isolated Planetary Mass Objects In Taurus And Upper Scorpius
Free-floating planetary mass objects-worlds that roam interstellar space untethered to a parent star-challenge conventional notions of planetary formation and migration, but also of star and brown dwarf formation.
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Icy Worlds, Press Release
Frigid Exoplanet 14 Herculis c Is In A Strange Orbit
A planetary system described as abnormal, chaotic, and strange by researchers has come into clearer view with NASA’s James Webb Space Telescope. Using Webb’s NIRCam (Near-Infrared Camera), researchers have successfully […]