Results 51 to 60 of about 3,808 (204)

Orbital Stability and Invariant Manifolds on Distant Retrograde Orbits around Ganymede and Nearby Higher-Period Orbits

Aerospace, 2022
In the past few years, distant retrograde orbits (DROs) have become increasingly popular due to their conspicuous stability. Nevertheless, it is this characteristic that results in the challenge to the design of transfer orbits into/out of DROs.
Qingqing Li, Yuming Tao, Fanghua Jiang
semanticscholar   +1 more source

Surface Features of Ganymede Revealed in Jupiter‐Shine by Juno’s Stellar Reference Unit

Geophysical Research Letters, 2022
On 7 June 2021, Juno crossed the orbital path of Jupiter’s moon Ganymede, flying within 1,046 km of the surface. Juno’s low‐light‐sensitive Stellar Reference Unit (SRU) navigation camera captured an image of the satellite’s dark side in a region of ...
Heidi N. Becker, Meghan M. Florence, Martin J. Brennan, Candice J. Hansen, Paul M. Schenk, Michael A. Ravine, John K. Arballo, Scott J. Bolton, Jonathan I. Lunine, Alexandre Guillaume, James W. Alexander   +10 more
doaj   +1 more source

Powering Ganymede's dynamo [PDF]

Journal of Geophysical Research: Planets, 2012
It is generally believed that Ganymede's core is composed of an Fe‐FeS alloy and that convective motions inside it are responsible for generating the satellite's magnetic field. Analysis of the melting behavior of Fe‐FeS alloys at Ganymede's core pressures suggests that, besides the growth of a solid inner core, convection can be driven by two novel ...
X. Zhan, G. Schubert
openaire   +1 more source

Polygonal impact craters on Ganymede

Meteoritics & Planetary Science
Polygonal impact craters (PICs) are unique geological features observed on various planetary bodies and constitute a small percentage of the impact crater population. This study focuses on PICs on Ganymede, where no such craters have been investigated so
N. R. Baby, T. Kenkmann, K. Stephan, R. Wagner   +3 more
semanticscholar   +1 more source

The influence of heterogeneous seafloor heat flux on the cooling patterns of Ganymede’s and Titan’s subsurface oceans

Icarus (New York, N.Y. 1962), 2022
Several icy moons of Jupiter and Saturn are known to possess deep water oceans. Heating in the rocky mantle underneath often produces heterogeneous heat flux patterns at the ocean’s seafloor.
F. Terra‐Nova, H. Amit, G. Choblet, G. Tobie, M. Bouffard, O. Čadek   +5 more
semanticscholar   +1 more source

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

Compression of Mercury's Dayside Magnetopause to the Surface: A Three‐Dimensional Model of Magnetospheric Structure and Dynamics

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We apply a hybrid model (kinetic ions, fluid electrons) to provide context for MErcury Surface Space ENvironment, GEochemistry, and Ranging (MESSENGER) observations of Disappearing Dayside Magnetosphere (DDM) events at Mercury. Such events have been observed on four occasions and are caused by Coronal Mass Ejections completely removing the ...
Georg Glebe, C. Michael Haynes, Sven Simon   +2 more
wiley   +1 more source

Magnetospheric‐Ionospheric‐Atmospheric Implications From the Juno Flyby of Ganymede

Journal of Geophysical Research: Planets
Juno flew over the northern mid‐latitudes of Ganymede during orbit 34 of the Juno mission, reaching an altitude of 1,053 km (16:56:07.972 UTC) at a sub spacecraft latitude/longitude of 33.66N, 57.5W degrees on 7 June 2021.
J. H. Waite, T. Greathouse, S. C. Carberry Mogan, A. Sulaiman, P. Valek, F. Allegrini, R. Ebert, G. Gladstone, W. S. Kurth, J. Connerney, G. Clark, F. Bagenal, S. Duling, N. Romanelli, S. Bolton, A. Vorburger, C. Paranicas, P. Kollmann, B. Mauk, C. Hansen, D. Buccino, R. E. Johnson, R. Wilson, B. Teolis   +23 more
semanticscholar   +1 more source

Passive Microwave Radiometry and Active Radar Sounding as Complementary Tools for Geophysical Investigations of Icy Ocean Worlds

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Juno Microwave Radiometer (MWR) observations of Europa and Ganymede offer critical insights into the icy shells of these moons ahead of NASA's Europa Clipper and ESA's JUpiter ICy moons Explorer (JUICE) missions. Both missions are equipped with active radar sounders designed to address key unknowns such as ice shell thickness, thermal state ...
Natalie S. Wolfenbarger, Anna L. Broome, Dustin M. Schroeder, Anton I. Ermakov, Scott J. Bolton, Donald D. Blankenship   +5 more
wiley   +1 more source

In Situ Ion Composition Observations of Ganymede's Outflowing Ionosphere

Geophysical Research Letters, 2022
On 7 June 2021 the Juno spacecraft passed through the Ganymede magnetosphere, with a closest approach altitude of 1,046 km. The Jovian Auroral Distributions Experiment‐Ion (JADE‐I) sensor observed ionospheric ions, consisting of O2+, O+, H2+, H+, and H3+.
P. Valek, J. H. Waite, F. Allegrini, R. Ebert, F. Bagenal, S. Bolton, J. Connerney, W. S. Kurth, J. Szalay, R. Wilson   +9 more
semanticscholar   +1 more source