Results 101 to 110 of about 34,434 (269)

Bifurcation in the history of Uranus and Neptune: the role of giant impacts [PDF]

Monthly notices of the Royal Astronomical Society, 2019
Despite many similarities, there are significant observed differences between Uranus and Neptune: While Uranus is tilted and has a regular set of satellites, suggesting their accretion from a disc, Neptune’s moons are irregular and are captured objects.
Christian Reinhardt, A. Chau, J. Stadel, R. Helled   +3 more
semanticscholar   +1 more source

Solving the Mystery of the Electron Radiation Belt at Uranus: Leveraging Knowledge of Earth's Radiation Belts in a Re‐Examination of Voyager 2 Observations

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Voyager 2 provided the only direct measurement of the radiation environment at Uranus and established the well‐accepted characterization of a system with a weaker ion radiation belt and surprisingly intense electron radiation belt. Recent re‐analysis of the flyby, however, suggests that these observations were not taken during normal solar ...
R. C. Allen, S. K. Vines, G. C. Ho
wiley   +1 more source

Uranus’s Influence on Neptune’s Exterior Mean-motion Resonances

The Planetary Science Journal
Neptune’s external mean-motion resonances play an important role in sculpting the observed population of trans-Neptunian objects (TNOs). The population of scattering TNOs is known to “stick” to Neptune's resonances while evolving in semimajor axis ( a ),
Severance Graham, Kathryn Volk
doaj   +1 more source

Effects of Convection‐Permitting Grid Resolution on Cold‐Season Precipitation Simulated by the Canadian Regional Climate Model Version 6 Over the Province of Quebec, Canada

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 21, 16 November 2025.
Abstract This study assesses the performance of the sixth‐generation Canadian Regional Climate Model (CRCM6) in simulating the amount and phase of cold‐season precipitation as well as 2‐m air temperature. It also examines the added value of finer grid spacing, which enables the explicit representation of deep convection.
O. Chalifour, B. Music, J. M. Thériault, D. F. Nadeau, A. Bédard‐Therrien   +4 more
wiley   +1 more source

The role of ice lines in the formation of Uranus and Neptune

Philosophical Transactions of the Royal Society A, 2020
We aim at investigating whether the chemical composition of the outer region of the protosolar nebula can be consistent with current estimates of the elemental abundances in the ice giants.
O. Mousis, A. Aguichine, R. Helled, P. Irwin, J. Lunine   +4 more
semanticscholar   +1 more source

Estimating Soft X‐Ray Emission From Uranus's Magnetosheath

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Soft X‐ray emission occurs within planetary magnetosheaths when highly charged solar wind ions undergo charge exchange with neutrals. The emission can provide dynamic views of the magnetosheath and cusps, allowing for investigations of the solar wind interaction with a planetary magnetosphere.
D. Naylor, L. C. Ray, W. R. Dunn, J. M. Jasinski, C. Paty   +4 more
wiley   +1 more source

A Compact Ion‐Electron Plasma Camera Spectrometer With an Instantaneous Hemispheric Field of View

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Using additive manufacturing and a selective metalization technique, we have developed a compact ion/electron plasma camera based on the donut topology. With its instantaneous field of view of 2πsr $2{\uppi }\mathrm{s}\mathrm{r}$, it eliminates the need for electrostatic deflectors.
Gwendal Hénaff, Matthieu Berthomier, Frédéric Leblanc, Jean‐Denis Techer, Yvan Alata, Carla Costa   +5 more
wiley   +1 more source

What do we Really Know about Uranus and Neptune?

, 2012
The internal structures and compositions of Uranus and Neptune are not well constrained due to the uncertainty in rotation period and flattening, as well as the relatively large error bars on the gravitational coefficients.
Boué, Fortney, Helled, Jacobson, Jacobson, Nettelmann, Radau, Safronov, Stevenson, Zharkov   +9 more
core   +1 more source

TRAPPED‐S, a New Environment Model Framework for Saturn: Focus on Radiation‐Specification Model

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract As space agencies contemplate missions to the outer planets' systems and moons, entailing prolonged observations via local orbiters or potential landers, meticulous assessment of the local environment—encompassing radiation and plasma conditions—is paramount for the design of both the platform and scientific payload.
A. Sicard, E. Roussos, K. Dialynas, Y. Hao, Q. Nénon, P. Jiggens, F. L. Johansson, A. Kamran   +7 more
wiley   +1 more source

A numerical exploration of Miranda's dynamical history

, 2013
The Uranian satellite Miranda presents a high inclination (4.338{\deg}) and evidences of resurfacing. It is accepted since 20 years (e.g. Tittemore and Wisdom 1989, Malhotra and Dermott 1990) that this inclination is due to the past trapping into the 3:1
Lemaitre, Anne, Noyelles, Benoit, Verheylewegen, Emilie   +2 more
core   +1 more source