[astro-ph.EP] The number of rocky extrasolar planets being discovered continues to increase, but so too does the apparent diversity of such worlds.
Earth
Posted inWater/Hycean Worlds & Oceanography
Iron Helped Scientists Trace Earth’s Oxygen. Now It’s Telling A Bigger Story
[Michigan State University] For decades, scientists have studied iron preserved in ancient rocks to reconstruct how Earth’s oceans and atmosphere became rich in oxygen. A new study suggests iron has […]
Posted inGaia - Planetary Perspectives
Global Carbon Fixation In Earth’s Subsurface Biosphere
[biorxiv.org] The subsurface of our planet hosts 15% of Earth’s biomass and plays a key role in mediating the exchange of volatiles and elements between deep, long-residence-time geological reservoirs and […]
![The PM showing the mounted SHAPE instrument (left) along with the zoomed in view (right). Three major sub-systems are also marked. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Shaping-SHAPE.png?resize=1200%2C714&ssl=1)
Posted inExoplanets, -moons, -comets
Shaping SHAPE – A Spectro-polarimeter Onboard Chandrayaan-3 To Observe Earth As An Exoplanet
[astro-ph.IM] Spectro-polarimetry of HAbitable Planet Earth (SHAPE) is an experimental instrument onboard the Propulsion Module (Orbiter) of the Chandrayaan-3 mission, designed to perform disc-integrated spectro-polarimetric observations of Earth from lunar […]
Posted inAtmospheres, Climate, Weather
MarsCast: Transfer Learning Of AI Weather Foundation Models To Planetary Atmospheres
[astro-ph.EP] We investigate the transferability of Earth weather foundation models to planetary atmospheres by adapting the GraphCast graph neural weather forecasting model to Mars. While GraphCast achieves state-of-the-art performance for […]
Posted inAstrogeology
Ancient Rocks Reveal How Water Shaped Earth 3.1 Billion Years Ago
[Adelaide University] Geologists studying some of the planet’s oldest volcanic rocks have uncovered new evidence that water was playing a major role in shaping Earth’s interior and driving volcanic activity […]
Posted inLava / magma ocean / Volcanic Worlds
Coupled AtmospHere Interior modeL Intercomparison (CHILI). I. Evolutionary Modelling — Primordial Magma Oceans of Earth and Venus
[astro-ph.EP] Earth and Venus represent two evolutionary outcomes arising from initially molten ‘magma ocean’ periods, followed by lifetimes of chemical and geophysical divergence. Their physics is common to all rocky […]
Posted inMagnetic Fields, Electromagnetism, bioelectricity,
The Strongest Evidence To Date Of A Magnetic Field On An Exoplanet
[IAC] The Instituto de Astrofísica de Canarias (IAC) is taking part in an international study, published in the journal “Science”, which provides the first conclusive evidence of a planet’s influence […]
Posted inEuropa, Meteorites & Asteroids, Origin & Evolution of Life, Panspermia, Planetary Protection & Biosafety, Status Report, Water/Hycean Worlds & Oceanography
Earth As A Potential Source Of Llife For Europa’s Subsurface Ocean
The paper discusses the possibility of dust particles containing living bacteria ejected from Earth reaching Europa and landing on its surface.
Posted inAnalog Studies, Astrogeology, Caves, Craters, Mountains, Subsurface, Lava Tubes, Impact events, Mars, Press Release
Shocked Soil Discovered: Rare On Earth, But Abundant On Mars?
When a meteoroid strikes, it generates a wave of energy that moves faster than the speed of sound. When all that energy propagates through material in seconds or less before […]