Results 41 to 50 of about 133,760 (131)

The Ionosphere of Uranus as Revealed by JWST

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract The first spectroscopic observations of Uranus by the James Webb Space Telescope were obtained in January 2023. Using these observations, we explored the physical properties of the planet's ionosphere through the analysis of near‐infrared H3+ ${\mathrm{H}}_{3}^{+}$ spectra.
Henrik Melin, L. N. Fletcher, H. B. Hammel, S. N. Milam, L. Moore, T. S. Stallard, J. O’Donoghue, P. I. Tiranti, E. M. Thomas, K. L. Knowles, M. Roman, L. Lamy, O. R. T. King, J. Harkett   +13 more
wiley   +1 more source

A Possible Complication of Using the 4.14 μm Band to Assess D/H Ratios on Icy Bodies

The Astrophysical Journal Letters
Determining isotopic ratios on the surfaces of extraterrestrial objects can provide insight into their formation conditions and evolution. Recently, remote-sensing detections of the 4.14 μ m HDO absorption band have enabled astronomers to estimate the D ...
Mark J. Loeffler, Rebecca A. Carmack, Stephen C. Tegler   +2 more
doaj   +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

Astrometric results of observations of mutual occultations and eclipses of the Uranian satellites in 2007

, 2020
Context. The photometry of mutual occultations and eclipses of natural planetary satellites can be used to infer very accurate astrometric data. This can be achieved by processing the light curves of the satellites observed during international campaigns
Aslan Z., Valdes Sada P., Casas R., Bhatt B., Miller C., Forné E., Coliac J., Braga-Ribas F., Modic R., Dumas C., Sicardy B., Arlot J., Emelyanov N., Vasundhara R., Colas F., Tanga P., Frappa E., Sahu D., Camargo J., Assafin M., Bel J., Ellington C., Khamitov I., Vieira-Martins R.   +23 more
core  

Photometric and astrometric analysis of a mutual event between the Uranian satellites Miranda and Oberon

, 2008
International audienceObservations of the predicted occultation between the satellites Miranda and Oberon were performed on 2007 July 30. Data analysis reveals that the predicted magnitude drop for this phenomenon was overestimated and we establish an ...
S.J. Bus, M. Birlan, V. Lainey, Arlot, Jean-Eudes, Lainey, Valéry, F. Colas, Nedelcu, Dan Alin, Rayner, J., Binzel, Richard P., R.P. Binzel, J. Rayner, D.A. Nedelcu, W. Thuillot, Bus, Schelte J., O. Vaduvescu, Birlan, Mirel, Vaduvescu, Ovidiu, J.‐E. Arlot, Thuillot, William, Colas, François   +19 more
core   +1 more source

Spectral Trends across the Rings and Inner Moons of Uranus and Neptune from JWST NIRCam Images

The Planetary Science Journal
JWST NIRCam images provide low-resolution spectra of the rings and inner moons orbiting Uranus and Neptune. These data reveal systematic variations in spectral parameters like the strength of the strong OH absorption band around 3 μ m and the spectral ...
M. M. Hedman, I. de Pater, R. J. Cartwright, M. El Moutamid, R. DeColibus, M. R. Showalter, M. S. Tiscareno, N. Rowe-Gurney, M. T. Roman, L. N. Fletcher, H. B. Hammel   +10 more
doaj   +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

Modeling the thermodynamical conditions in the Uranian subnebula – Implications for regular satellite composition

, 2003
We study the thermodynamical conditions existing in the Uranian subnebula from which the regular satellites were presumably formed, assuming it was produced by an earth-sized body impact on proto-Uranus (Stevenson [CITE]; Slattery et al. [CITE]).
O. Mousis
core   +1 more source

Ocean Worlds Maintained by Ocean Tidal Heat Expected on Several Uranian Moons

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract In recent NASA decadal surveys, detecting oceans among Uranus' moons has been identified as a research priority in future missions. Currently, the prevailing view in planetary science is that the likelihood of finding oceans is highest on the larger moons, Titania and Oberon, due to their higher integrals of radiogenic heat sources. This study
Robert H. Tyler
wiley   +1 more source

Post eclipse thermal response of Uranian satellites with SINFONI: a status report .

, 2008
We report on the status of a project to measure eclipse-induced changes in surface temperature on the major Uranian satellites. Such measurements enable a uniquely direct determination of the thermal inertia, a measure of the resistance to changes in ...
Mueller, M., Tozzi, G. P., Grundy, W., Stansberry, J., Delbo, M., Maris, M., Hestroffer, D., Thuillot, W., Tanga, P.   +8 more
core   +2 more sources