[NASA/UA HiRISE] The mid-latitudes of Mars are mostly covered with smooth material that scientists have suspected to be ice for some time. The ground is uniform and dusty and does […]
astrogeology
![(A) C1 clast containing numerous magnetite (white), pyrrhotite (light gray), and dolomite grains (dark gray). (B) C1 clast with numerous dolomites marked “D,” indicating the dolomite crystal where the FIB was cut (bottom, arrowed, and outlined in yellow). (C) Bright-field TEM image of the FIBed dolomite crystal. Numerous cracks are arrowed. (D) Na x-ray map of the same area as in (C). -- [Science Advances]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Meteor-over-New-.png?resize=1200%2C715&ssl=1)
Posted inMeteorites & Asteroids
Brines Discovered In A Meteorite From A Primitive CM Asteroid
[Science Advances] The CI (Ivuna-type) carbonaceous material returned from asteroids Ryugu and Bennu contain mobilized sodium from the evaporation or freezing of liquid water into brines, shedding light on the […]
Posted inExoplanets, -moons, -comets
Planetesimal Formation Across the Stellar Mass Spectrum and its Influence on Exoplanet-Inherited Volatile Budgets
[astro-ph.EP] Protoplanetary discs emerging from collapsing molecular clouds are capable of forming planetesimals at the water snowline during both the cloud collapse and Class II disc phases; such a scenario […]
Posted inComets and Asteroids
A Comprehensive Study Of Comet 67P/Churyumov-Gerasimenko In The 2021/2022 Apparition. II. Colorimetry, Polarimetry, Modeling
[astro-ph.EP] This paper presents the second part of our multi-technique observational study of comet 67P during its 2021-2022 apparition. While the first paper focused on photometry and spectroscopy, here we […]
Posted inIo
Lava World Recon: Juno Studies Io’s Volcanoes
[NASA] NASA’s Juno mission has provided the first measurements of the temperature below the surface of Jupiter’s moon Io, revealing significant heating within the shallow subsurface of the most volcanically […]
![Vertical component spectrogram of event S1094b, caused by a meteoritic impact (Posiolova et al., 2022). The bottom two panels show P- and S-wave spectra in several 60 second time windows following the direct arrival. The spectral shape stays consistent throughout the inital 150 and 230 seconds after arrival of the phase, indicating an equipartitioning of seismic energy with no significant viscoelastic attenuation. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Discrimination-of.png?resize=1200%2C719&ssl=1)
Posted inMars
Discrimination of Tectonic, Swarm And Impact-related Marsquakes Using Spectral Characteristics
[astro-ph.IM] The NASA InSight mission observed over 2000 marsquakes in the course of its three year mission. These quakes varied in magnitude between 1.5 and 4.5, as well as in […]
Posted inComets and Asteroids
The Polana-Eulalia Complex with JWST NIRSpec: Connections to Bennu, Ryugu, and Outer Solar System Bodies
[astro-ph.EP] Carbon rich [C complex] asteroids provide insight into the early Solar System, and families of C complex asteroids serve as robust samples for learning about the internal structure of […]
Posted inAstrochemistry
Efficient Interstellar Grain Growth From High Sticking Coefficients On Amorphous Carbon Dust
[astro-ph.GA] Cosmic dust is the solid phase of the interstellar medium (ISM), classically assumed to be composed of carbonaceous and silicate grains with size distributions spanning ∼5 Å to ∼1 […]
Posted inImpact events
Researchers Identify Class Of Oddball Meteorite That Killed Earth’s Dinosaurs
[University of British Columbia] A rare CO chondrite meteorite was the probable impactor that struck Earth 66 million years ago, wiping out 75 per cent of Earth’s species, including non-avian […]
Posted inBiosignatures & Paleobiology
Mineral Biosignature Identification From Raman Spectroscopy Using Machine Learning
[PNAS] Biosignature detection remains a key challenge in astrobiology, yet robust mineral biosignatures remain limited. Raman spectroscopy is increasingly applied in planetary exploration, but its high-dimensional spectral information has not […]