[ESA] The footage shows the simultaneous deployment of two landing legs from the ExoMars landing platform, in two sequential pairs.
Astrogeology
![The band depths and centers of Callisto’s CO2 as measured at 4.25 µm for three viewing geometries. The trailing hemisphere and Asgard-centered data were previously published by Cartwright et al. (2024). The following geologic units are marked with symbols: Valhalla, ⋆ ; Asgard, ◦; Lofn/Heimdall, △. The sub-observer longitude of the observation is indicated in the panels. The projected angular size of Callisto varies slightly between each observation, so the spaxel scale is slightly different in each panel. The typical uncertainty in the band depth is ± 0.4%, while the band center is ±0.0006µm -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Callisto.png?resize=1200%2C709&ssl=1)
Posted inCallisto
Callisto From JWST: CO2-rich Terrain On The Leading Hemisphere And Global Patterns Of H2O Ice
[astro-ph.EP] We present maps of H2O, CO2, and a 4.57 um spectral feature across Callisto’s surface observed using the James Webb Space Telescope (JWST).
![Evolution of impact-generated debris for the high-velocity impact cases. Rows correspond to different impact scenarios with varying orbital periods (Porb) and impact velocities (vimp), as labeled. Columns show snapshots at 0.35, 2.65, 14.69, and 18.05 hr after impact. Particles are shown in a midplane slice with |z| < 0.1 R⊕, and colors indicate material origin and composition. In the 2.65 and 14.69 hr snapshots, particles are additionally highlighted according to their final fate, identifying those incorporated into the disk and those that later escaped from the system.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/A-Formation.png?resize=1200%2C716&ssl=1)
Posted inExoplanets, -moons, -comets
A Formation-Stage Bottleneck For Exomoons Around Close-in Rocky Planets
[astro-ph.EP] Massive moons around rocky exoplanets are expected outcomes of giant impacts, yet no exomoon has been securely confirmed.
Posted inPluto
New Horizons Finds Evidence Of Recent Liquid On Pluto’s Surface
[NASA] “Pluto never stops surprising us,” said Alan Stern, principal investigator of New Horizons and lead study author from the Southwest Research Institute in Boulder, Colorado. “In addition to suggesting […]
Posted inAstrogeology
High Solubility Of Water In Post-perovskite And Bridgmanite In The Earth’s Deep Lower Mantle
[physics.geo-ph] Water in the Earth’s mantle induces melting, giving rise to strong chemical heterogeneity, and alters its rheological and transport properties, which are keys to understanding seismic-wave speeds anomalies, convective […]
Posted inComets and Asteroids
A JWST Study of Stardust. I. Infrared Spectroscopy of Comet 81P/Wild 2 and Overall Composition
[astro-ph.EP] We report observations of comet 81P/Wild 2, target of the Stardust sample return mission, on UT 2023 March 20 and 24 at a heliocentric distance (rH) of 1.85 au […]
Posted inMars
A Consolidated Mössbauer Spectrum For Undisturbed Soils From Gusev Crater, Mars
[Springer Nature] Mössbauer analyses from MIMOS II data collected on Mars provided breakthrough insights into iron mineralogy of the planet’s surface. [Life] Resulting from limited measurement time, science operations were […]
Posted inComets and Asteroids
Gelato: A Mission Concept for Comet Surface Sample Return
[The Planetary Science Journal] Understanding the role of comets in solar system formation and evolution has continued to be a driving question in planetary science. It is believed that comets […]
Posted inIo
Lava World Recon: Juno Measures Subsurface Temperature Of Io
[SwRI] NASA’s Juno mission has made the first direct measurements of the temperature below the surface of Jupiter’s moon Io, which reveal significant heating in the upper few feet of […]
Posted inMars
Mars Curiosity Blog Sols 4961-4967: Approaching a Break in the Rock Record?
[NASA JPL] Earth planning date: Friday, July 24, 2026