[astro-ph.EP] Sulfur chemistry has emerged as an important probe of exoplanet atmospheres in the JWST era, although observational constraints have thus far been largely limited to SO2 and H2S in […]
Atmospheres, Climate, Weather
Posted inExoplanets, -moons, -comets
Transmission Spectrum of the Benchmark Temperate Exo-Neptune TOI-1231 b
[astro-ph.EP] The JWST is revolutionizing our understanding of the temperate sub-Neptune population through atmospheric spectroscopy.
Posted inExoplanets, -moons, -comets
Planet Formation In Chemically Diverse And Evolving Discs II. Chemical Fingerprints In Planetary Atmospheres
[astro-ph.EP] Giant planets form in protoplanetary discs, where the coupled dynamical and chemical evolution of gas and solids determines the composition of the material they accrete. We investigate how planet […]
Posted inMars
Gullies In The Equatorial Region of Mars
[NASA] Although gullies are most common in the middle latitudes of Mars, they are also found in equatorial regions. This image shows a 3-kilometer-wide impact crater with gullies all along […]
Posted inBiosignatures & Paleobiology
Orbital Biosignature Assay: Watching Forests Grow From Space
[Chinese Academy of Sciences] Forests are central to climate mitigation, yet tracking how fast they grow over decades remains difficult.
Posted inExoplanets, -moons, -comets
Nearby “Super Earth” May Be A Better Candidate For Life Than Previously Thought
[UT Austin] Using the Hobby-Eberly Telescope at McDonald Observatory, astronomers have taken a closer look at a nearby exoplanet and discovered it may be more Earth-like than previously thought. The […]
Posted inExoplanets, -moons, -comets
Improving Exoplanet Mass Characterisation With Bayesian Model Selection Using The Learned Harmonic Mean Estimator
[astro-ph.EP] Radial velocity (RV) analyses require modelling choices (such as eccentricity treatment, noise model, velocity trends, and number of planets) that can significantly affect derived planetary masses.
Posted inAstrochemistry
Unveiling Complex Chemistry In Planet-forming Disks With The SKAO
[astro-ph.SR] The chemical composition of planets is inherited from that of the natal protoplanetary disk at the time of planet formation.
![Kiel diagram for 290 stars with 5000 K ≤ Teff ≤ 6500 K and log g ≥ 4.0 dex analyzed in this work. The dashed black lines present the solar values obtained for the Ceres 2009-02-08 solar spectrum, Teff = 5759±18 K, log g = 4.43±0.05 dex and [Fe/H] = 0.00±0.01 dex. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Chemical-Abundances.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry
Chemical Abundances of the Bioessential Elements C, O and S, and the Refractory Elements
[astro-ph.EP] We determined atmospheric and evolutionary parameters, along with chemical abundances of C, O, S, Fe, and Ni for 290 solar-type exoplanet hosting stars using high-resolution HARPS-North and HARPS-South spectra, […]
Posted inMars
Martian Dust Storms May Ggenerate Atmospheric Electrical Conditions That Could Impact Mars Missions
[UAH] A new study by a doctoral researcher at The University of Alabama in Huntsville (UAH), a part of The University of Alabama System, suggests global dust storms on Mars […]