[Nature Astronomy] Among icy moons of the outer Solar System, subsurface water oceans and large collisions both seem to be common, but the impact of the latter on the presence […]
imapct event
![Inclination vs. semimajor axis for the NEOs. The main asteroid families that have been linked to ordinary chondrites are represented by gray squares. The ν6 secular resonance with Saturn and the 3:1 and 5:2 mean motion resonances with Jupiter are represented with dashed lines. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Size-Constraints.png?resize=1200%2C718&ssl=1)
Posted inAstrogeology
Size Constraints For The Pre-atmospheric Parent Bodies Of Ordinary Chondrites
[astro-ph.EP] The study of S-complex near-Earth objects (NEOs), the parent bodies of ordinary chondrites, has shown that they are dominated by asteroids with LL chondrite-like compositions. This is surprising because […]
![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 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 inImpact events
Asteroid Assault Made Ancient Earth Too Hot And Chaotic For Continents To Form
[Curtin University] New research led by Curtin University and QUT (Queensland University of Technology) has revealed repeated asteroid impacts may have been the dominant force shaping the early Earth, delivering […]
Posted inAstrogeology, Biosignatures & Paleobiology, Impact events, Mars, Meteorites & Asteroids, Panspermia, Status Report
Could Life Have Been Transferred From Mars To Earth? Laboratory And Computational Simulations Of Martian Ejecta
The study of the origin of life on Earth has been broadened due to panspermia models that suggest that early life may have been transferred between planets.
Posted inBiosignatures & Paleobiology, Comets and Asteroids, Meteorites & Asteroids, Missions & Hardware, Planetary Protection & Biosafety, Sample Return, Status Report
Analysing The Sample Preparation Process In Meteorites And Its Impact On The Pretreatment Of Returned Samples To Earth
The study of meteorites is important for planetary sciences because, among other things, it can provide information about the geochemical composition of their celestial body of origin. Often, subsample preparation […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Caves, Craters, Mountains, Subsurface, Lava Tubes, Genomics, Proteomics, Bioinformatics, Habitable Zones, Impact events, Origin & Evolution of Life, Panspermia, Sample Return, Status Report
Experimental And Numerical Modeling Of Liposome Congregation In Meteorite Craters Of Early Earth
This paper provides experimental and numerical evidence supporting the occurrence of liposome congregation at the floors of meteor craters on Early Earth.
Posted inAstrogeology, Biogeochemical Cycles & Geobiology, Caves, Craters, Mountains, Subsurface, Lava Tubes, Impact events, Meteorites & Asteroids, Press Release
Earth’s Largest Modern Crater Discovered In Southern China
A newly discovered, remarkably well-preserved impact crater is shedding fresh light on how extraterrestrial bodies collide with Earth.
Posted inExoplanets, -moons, -comets, Impact events, Lava / magma ocean / Volcanic Worlds, Status Report, Water/Hycean Worlds & Oceanography
Multiple Giant Impacts and Chemical Equilibria: An Integrated Approach to Rocky Planet Formation
During the formation of rocky planets, the surface environments of growing protoplanets were dramatically different from those of present-day planets.