[Potsdam Institute for Climate Impact Research (PIK)] Seven breached Planetary Boundaries continue to worsen as record ocean heat, droughts, floods, wildfires and extreme heat reveal an Earth system under strain, […]
Atmospheres, Climate, Weather
Posted inOrigin & Evolution of Life
Prebiotic Peptide Formation Triggered By Urea-rich Warm Little Ponds On Early Earth
[Bioorganic Chemistry]. In the study of the origin of life, the polymerization of amino acids into peptides in water faces significant thermodynamic barriers, often referred to as the “water problem.”
Posted inMars
Thyles Rupes Region Of Mars
[ESA] We’re used to seeing pictures of Mars that are very different in colour to this berry-toned view, featuring tans, ochres, reds and browns – all caused by high levels […]
Posted inOrigin & Evolution of Life
Do Himalayan-style Mountains Lie Under The Antarctic ice: Implication For The Gondwana Supermountains, The Rise Of Oxygen And The Cambrian Explosion?
[Earth and Planetary Science Letters] Analyses of detrital zircons from Antarctica show that its tectonics were dominated by Himalayan-style mountains, the roots of which now underlie the ice sheet.
Posted inMars
Complex Water Systems Revealed On Early Mars
[NASA] A new study reveals that Jezero Crater’s enigmatic ‘Margin Unit’ was shaped by a complex sequence of ancient lakes, groundwater systems, and hydrothermal fluids.
Posted inExoplanets, -moons, -comets
Graph Neural Networks For Exoplanet Atmospheres
[astro-ph.IM] Calculating disequilibrium chemistry in exoplanet atmospheres remains a significant computational bottleneck in atmospheric retrievals. The increasing observational precision from facilities such as JWST and the Ariel mission requires including […]
![Radial velocity timeseries of K2-3 used in the analysis. Here the second dimension for the multi-dimensional quasi-periodic gaussian process kernes used the D2V activity indicator to disentangle the stellar activity from the Keplerian signals. The Keplerian models for all three planets are assumed to be circular orbits for this figure (Model 1 in Table C.3). The various instruments used in the analysis are colour coded. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Uncovering.png?resize=1200%2C719&ssl=1)
Posted inExoplanets, -moons, -comets
Uncovering Temperate Worlds: An Updated Look At The K2-3 System With ESPRESSO
[astro-ph.EP] The K2-3 system is one of the most unique planetary systems as it features three transiting sub-Neptunes in decreasing order of radii, spanning the radius valley.
![Atmospheric energy deposition profiles of GCRs and SEPs in the atmosphere of K2-18b for different magnetic field strengths. The profiles have been smoothed to improve visual clarity. For visibility, the deposited energy corresponding to B=300 µT has been multiplied by a factor of 10. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Energy-.png?resize=1200%2C718&ssl=1)
Posted inSpace Weather & Heliophysics
Energy Deposition In Planetary And Exoplanetary Atmospheres Induced By Cosmic Rays
[astro-ph.EP] Cosmic rays can significantly alter the abundances of certain species in the upper layers of planetary atmospheres, especially in terms of their biosignatures. To fully understand the extent of […]
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.
![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.