Results 71 to 80 of about 7,946 (214)
Surface‐Driven Protocell Formation in Geologically Relevant Early Earth Environment
ChemSystemsChem, Volume 8, Issue 2, March 2026.Illustration of a prebiotic early‐Earth environment showing cell‐like protocells (blue spheres) and other complex organic molecules (pink and green spheres) distributed across terrestrial surfaces and within subsurface niches. Volcanic landscapes and mineral‐rich substrates provide diverse geochemical settings for the assembly and evolution of ...
Pamela Knoll, Silvia Holler
wiley +1 more source
Geysers' Dust Dynamics Inside the Hill Sphere of Enceladus
Geophysical Research LettersIn this work, we study the trajectories of the dust particles ejected in the geysers of the moon Enceladus, inside its Hill sphere, where its gravitational influence dominates. Our goal is to determine the properties of the particles that escape from the
Alberto Flandes +2 more
doaj +1 more source
Comparing Jupiter and Saturn: dimensionless input rates from plasma sources within the magnetosphere [PDF]
Annales Geophysicae, 2008 The quantitative significance for a planetary magnetosphere of plasma sources associated with a moon of the planet can be assessed only by expressing the plasma mass input rate in dimensionless form, as the ratio of the actual mass input to some ...
V. M. Vasyliūnas
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Phase‐Space Synchronization Driven by Moon‐Magnetosphere Coupling in Gas Giants
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract We present a new theoretical framework to describe the rapid and spatially localized loss of energetic particles in planetary radiation belts, focusing on interactions between gas giant magnetospheres and their moons. Observations show that flux depletions—known as microsignatures—often refill on timescales comparable to a single drift period,
Adnane Osmane +2 more
wiley +1 more source
Estimating the Initial Mass of the Gaia–Enceladus Dwarf Galaxy with a Chemical Evolution Model
The Astrophysical JournalThis work investigates the initial mass and chemical evolution history of the Gaia–Enceladus dwarf galaxy. We combine spectroscopic data from APOGEE with astrometric data from Gaia Data Release 3 to identify Gaia–Enceladus candidate stars via a machine ...
Olcay Plevne, Furkan Akbaba
doaj +1 more source
JWST/NIRSpec Reveals the Atmospheric Driver of Saturn's Variable Magnetospheric Rotation Rate
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract Past measurements of Saturn's upper atmosphere have allowed only a broad scale view of the temperature and ion density structures within the auroral region. However, Saturn's auroral currents include a planetary period current component that is produced by neutral atmospheric flows.
Tom S. Stallard +15 more
wiley +1 more source
The Challenge of Icy Sample Return Begins With Artemis
Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.Abstract Throughout the Solar System, volatiles are found as solid ices. Returning ices to Earth for scientific analysis is critical to understanding the formation of a Solar System that bears life. This challenge begins with the Artemis missions to the lunar south polar region, where the coldest lunar regolith is enriched in H2O and other ices—systems
D. L. Gilbertson +7 more
wiley +1 more source
Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data
Geophysical Research Letters, 2016 The intense plume activity at the South Pole of Enceladus together with the recent detection of libration hints at an internal water ocean underneath the outer ice shell.
Ondřej Čadek +10 more
doaj +1 more source
, 2019 Enceladus is characterised by a south polar hot spot associated with a large outflow of heat, the source of which remains unclear. We compute the viscous dissipation resulting from tidal and libration forcing in the moon's subsurface ocean using the ...
Dehant, V. +3 more
core +1 more source