![(Top) Measured OC albedo values from Goldstone (from Table 4) and (bottom) measured OC albedo values from the GBT (from Table 5). The horizontal dashed lines indicate the weighted means of the albedos, which is 0.90 for Goldstone and 0.80 for GBT. The error bars on our albedo values are taken to be the total uncertainty calculated in Section 4. The color bar on the right shows the dates of our observations in YYMMDD. The x-axis is the subradar point west longitude. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Radar-observations.png?resize=1200%2C751&ssl=1)
[astro-ph.EP] Three of Jupiter’s Galilean satellites – Europa, Ganymede, and Callisto – are of particular scientific interest due to their icy shells and suspected subsurface oceans. However, the radar properties […]
Ganymede
Posted inJupiter
Joint Dynamical-geophysical Evidence For A Limit Cycle In The Galilean Moons
[astro-ph.EP] Io, Europa, and Ganymede orbit in the Laplace mean-motion resonance, where their orbital and thermochemical evolution are strongly coupled [1-5]. Forced eccentricities sustain tidal dissipation, powering Io’s volcanism and […]
Posted inJupiter
The Recent Crossing Of The 7:3 Resonance Between Ganymede And Callisto
[astro-ph.EP] Io, Europa and Ganymede are locked in the well-known Laplace resonance, while Callisto is not, even though it is very close to the 7:3 mean motion resonance with Ganymede. […]
Posted inIcy Worlds
Dynamic Controls On Subsurface Water Chemistry And Habitability On Icy Moons
Icy moons are natural satellites whose surfaces contain a substantial fraction of frozen materials, most notably water ice.
Posted inCallisto, Europa, Ganymede, Habitable Zones, Icy Worlds, Journal articles, Press Release, Water/Hycean Worlds & Oceanography
Radar Echoes From Europa Reveal Secrets Beneath the Ice
A team of scientists has used NASA’s Goldstone Solar System Radar and the U.S. National Science Foundation Green Bank Telescope (NSF GBT) to carry out the most extensive radar study […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Ganymede, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Missions & Hardware, Status Report
Potential Cryovolcanic Regions on Ganymede: A Priority Target for JUICE
One of the Jupiter Icy Moons Explorer (JUICE) mission goals of the European Space Agency, launched in 2023 April, is the detailed characterization of Ganymede, Jupiter’s largest moon and a […]
Posted inAstrochemistry, Astrogeology, Biosignatures & Paleobiology, Callisto, Enceladus, Europa, Ganymede, Icy Worlds, Imaging & Spectroscopy, Status Report
Temperature-programmed Desorption Of SO2 From Water Ice Surfaces: Adsorption Energy Distributions
Context. Sulphur-bearing species play a key role in the chemical evolution of the interstellar medium and icy Solar System bodies such as the Jovian moons, yet the sulphur budget remains […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Cryobiology, Enceladus, Europa, Ganymede, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Magnetic Fields, Electromagnetism, bioelectricity,, Mapping, Geodesy, Cartography, Bathymetry, Status Report, Titan, Water/Hycean Worlds & Oceanography
Electrical Properties of Icy World Oceans from Laboratory Measurements
Many icy bodies in the Solar System are hypothesized to harbor subsurface liquid-water oceans, with Jupiter’s moon Europa among the most promising for astrobiology research. NASA’s Europa Clipper mission will […]
Posted inAstrogeology, Callisto, Ganymede, Icy Worlds, Imaging & Spectroscopy, Jupiter, Press Release
Ganymede Might Still Be Forming Its Metal Core Today
Jupiter’s moon Ganymede is the largest moon in the solar system; at over 3,200 miles across, it is larger than the planet Mercury. It is also the only moon with […]
Posted inBiosignatures & Paleobiology, Comets and Asteroids, Cryobiology, Dione, Enceladus, Europa, Ganymede, Habitable Zones, Hyperion, Iapetus, Icy Worlds, Mimas, Oberon, Status Report, Titan
Quantum Chemical Insights into the Dissociation of Phenol: Shedding Light on Impact Ionization Mass Spectrometry for Icy Moon Exploration
CDA revealed that Enceladus hosts a rich organic and inorganic chemical inventory in its subsurface ocean, hinting at its potential habitability. Analysis of fragmentation patterns with laser desorption experiments for […]