Results 61 to 70 of about 3,808 (204)

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, J. W. Boyce, A. D. Bravenec, M. C. Huh, F. M. McCubbin, E. K. Lewis, J. Gross, J. Davidson   +7 more
wiley   +1 more source

Temporal and Spatial Variability of the Electron Environment at the Orbit of Ganymede as Observed by Juno

Journal of Geophysical Research: Space Physics
The thermal and energetic electrons along Ganymede's orbit not only weather the surface of the icy moon, but also represent a major threat to spacecraft.
S. Pelcener, N. André, Q. Nénon, J. Rabia, M. Rojo, A. Kamran, M. Blanc, P. Louarn, E. Penou, D. Santos-Costa, F. Allegrini, R. Ebert, R. Wilson, J. Szalay, B. Mauk, C. Paranicas, G. Clark, F. Bagenal, S. Bolton, AL Pelcener   +19 more
semanticscholar   +1 more source

Driver of Energetic Electron Precipitation in the Vicinity of Ganymede

Geophysical Research Letters, 2023
The driver of energetic electron precipitation into Ganymede's atmosphere has been an outstanding open problem. During the Juno flyby of Ganymede on 7 June 2021, Juno observed significant downward‐going electron fluxes inside the bounce loss cone of ...
W. Li, Q. Ma, X.‐C. Shen, X.‐J. Zhang, B. H. Mauk, G. Clark, F. Allegrini, W. S. Kurth, G. B. Hospodarsky, A. Sulaiman, T. A. Nordheim, S. J. Bolton   +11 more
doaj   +1 more source

The Jovian Energetic Ion Environment of Ganymede: Planetary Space Weather Considerations in View of the JUICE Mission

Astrophysical Journal, 2022
Determining the properties of radiation environments inside planetary magnetospheres is one of the key challenges of planetary space weather science. In this work, we expand our recent simulations of the Jovian energetic ion precipitation to Ganymede’s ...
C. Plainaki, S. Massetti, X. Jia, A. Mura, E. Roussos, A. Milillo, D. Grassi   +6 more
semanticscholar   +1 more source

Galileo PLS Plasma Observations During the E12 Europa Flyby Refuting an Encounter With a Cryovolcanic Plume

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract During Galileo's closest (“E12”) flyby of Europa, a brief burst of wave activity was recorded by the plasma wave instrumentation, PWS. This was speculatively interpreted by Jia et al. (2018, https://doi.org/10.1038/s41550‐018‐0450‐z) as a 2,100 cm−3 spike in plasma densities from a water plume encounter. While the plasma instrument, PLS, could
William. R. Paterson, Glyn. A. Collinson
wiley   +1 more source

Analysis of Close Encounters With Ganymede and Callisto Using a Genetic n-Body Algorithm

Frontiers in Astronomy and Space Sciences, 2018
In this work we describe a genetic algorithm which is used in order to study orbits of minor bodies in the frames of close encounters. We find that the algorithm in combination with standard orbital numerical integrators can be used as a good proxy for ...
Philip M. Winter, Mattia A. Galiazzo, Thomas I. Maindl   +2 more
doaj   +1 more source

Slantwise Convection and Heat Transport in Icy Moon Oceans

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Ocean heat transport on icy moons shapes the ice shell topography, a primary observable of these moons. Two key processes control the heat transport: baroclinic instability driven by surface buoyancy contrasts and convective instability driven by heating from the core.
Yaoxuan Zeng, Malte F. Jansen
wiley   +1 more source

Ganymede’s Tenuous Atmosphere

Ganymede possesses a tenuous water-based atmosphere, thought to be produced by the solar and Jovian plasma irradiation of its icy surface. Observational evidence for Ganymede's atmosphere is provided by far-ultraviolet (FUV) emission from the atomic oxygen (O) and hydrogen (H) constituents.
Roth, L., Plainaki, C., Oza, A.V., Vorburger, A., Johnson, R.E., Molyneux, P.M., Retherford, K.D., Leblanc, François, Massetti, S., Mura, A., Wurz, P.   +10 more
openaire   +3 more sources

Investigation on the Coherent Component of SHARAD Surface Echo and Surface Roughness: Scaling Behavior and Influence of Hurst Exponent

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract The radar surface echo can be separated into coherent and incoherent components by statistical approaches, and the coherent component can be described by a backscattering model related to the RMS height. According to backscattering models for fractal surfaces, the coherent power in decibels decreases with RMS height on a scale independent of ...
Tiansheng Hong, Yan Su, Elena Pettinelli, Roberto Orosei, Sebastian Emanuel Lauro, Zhibin Li, Chunyu Ding, Elisabetta Mattei, Barbara Cosciotti, Chunlai Li   +9 more
wiley   +1 more source

The High‐Frequency Tidal Response of Ocean Worlds: Application to Europa and Ganymede

Journal of Geophysical Research: Planets, 2022
Europa and Ganymede, whose liquid water oceans are of uncertain thickness, are subject to tidal forces across a broad frequency spectrum. Tidal deformation is inherently frequency dependent, an effect which is enhanced when a subsurface ocean is present.
H. Hay, I. Matsuyama, R. Pappalardo
semanticscholar   +1 more source