Results 51 to 60 of about 3,792 (204)

Astronomical Constraints on Some Long‐Range Models of Modified Gravity

Advances in High Energy Physics, Volume 2007, Issue 1, 2007., 2007
We use the corrections to the Newton‐Einstein secular precessions of the longitudes of the perihelia of the inner planets, phenomenologically estimated E.V. Pitjeva by fitting almost one century of data with the EPM2004 ephemerides, to constrain some long‐range models of modified gravity recently put forth to address the dark energy and dark matter ...
Lorenzo Iorio, Sandip Pakvasa
wiley   +1 more source

Prominent Mid-infrared Excess of the Dwarf Planet (136472) Makemake Discovered by JWST/MIRI Indicates Ongoing Activity

The Astrophysical Journal Letters
We report on the discovery of a very prominent mid-infrared (18–25 μ m) excess associated with the trans-Neptunian dwarf planet (136472) Makemake. The excess, detected by the Mid-Infrared Instrument of the James Webb Space Telescope, along with previous ...
Csaba Kiss, Thomas G. Müller, Anikó Farkas-Takács, Attila Moór, Silvia Protopapa, Alex H. Parker, Pablo Santos-Sanz, Jose Luis Ortiz, Bryan J. Holler, Ian Wong, John Stansberry, Estela Fernández-Valenzuela, Christopher R. Glein, Emmanuel Lellouch, Esa Vilenius, Csilla E. Kalup, Zsolt Regály, Róbert Szakáts, Gábor Marton, András Pál, Gyula M. Szabó   +20 more
doaj   +1 more source

The orbital distribution of trans-Neptunian objects beyond 50 au

, 2016
The dynamical structure of the Kuiper belt beyond 50 au is not well understood. Here we report results of a numerical model with long-range, slow and grainy migration of Neptune.
Nesvorny, David, Roig, Fernando, Vokrouhlicky, David   +2 more
core   +1 more source

Pole‐to‐Pole Vertical Ionospheric Profiles at Jupiter From JWST

Journal of Geophysical Research: Space Physics, Volume 130, Issue 8, August 2025.
Abstract We present the first pole‐to‐pole observations of Jupiter's ionosphere, capturing dawn and dusk vertical structure up to 5,000 km altitude using the James Webb Space Telescope (JWST), simultaneous to Juno's radio occultation experiments (ROX) in September 2023.
Paola I. Tiranti, H. Melin, L. Moore, K. L. Knowles, T. S. Stallard, J. O’Donoghue, K. Roberts, K. Mohamed, E. M. Thomas   +8 more
wiley   +1 more source

OSSOS. XXIX. The Population and Perihelion Distribution of the Detached Kuiper Belt

The Planetary Science Journal, 2023
The detached trans-Neptunian objects (TNOs) are those with semimajor axes beyond the 2:1 resonance with Neptune that are neither resonant nor scattering.
Matthew Beaudoin, Brett Gladman, Yukun Huang, Michele Bannister, J. J. Kavelaars, Jean-Marc Petit, Kathryn Volk   +6 more
doaj   +1 more source

Orbit of a Possible Planet X

The Astrophysical Journal
The plausibility of an unseen planet in the outer solar system, and the expected orbit and mass of such a planet, have long been a topic of inquiry and debate.
Amir Siraj, Christopher F. Chyba, Scott Tremaine   +2 more
doaj   +1 more source

Influences of Non‐Oberbeck–Boussinesq Effects on Tracer Transport in Icy Ocean Worlds

Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.
Abstract The subsurface oceans on icy satellites are potentially habitable. To understand their habitability, we need to know how tracers with various lifetimes distribute. Convection is the main vehicle for tracer transport, and we expect convection on icy satellites to differ from regular rotating convection, because as pressure increases, water's ...
Shuang Wang, Wanying Kang
wiley   +1 more source

Chaotic Dynamics of Trans-Neptunian Objects Perturbed by Planet Nine

, 2018
Observations of clustering among the orbits of the most distant trans-Neptunian objects (TNOs) has inspired interest in the possibility of an undiscovered ninth planet lurking in the outskirts of the solar system.
Hadden, Sam, Holman, Matthew J., Li, Gongjie, Payne, Matthew J.   +3 more
core   +1 more source

Last giant impact on the Neptunian system. Constraints on oligarchic masses in the trans-Saturnian region [PDF]

, 2011
Stochastic impacts by large bodies are, at present, the usually accepted mechanisms able to account for the obliquity of the ice giants. We attempt to set constraints on giant impacts as the cause of Neptune's current obliquity in the framework of modern
Agnor, Benvenuto, Bodenheimer, Bottke, Boué, Briceño, Brunini, Brunini, Chambers, Colombo, Crida, Cuk, Cuk, Dodson-Robinson, Fernández, Ford, Goldreich, Goldreich, Grav, Greenberg, Hamilton, Heppenheimer, Holman, Jewitt, Johansen, Korycansky, Kubo-Oka, L. del Valle, Lee, Levison, Levison, Lissauer, Lissauer, Lissauer, M. G. Parisi, Maris, Maris, Morbidelli, Nesvorny, Nesvorny, Nesvorny, Parisi, Parisi, Paszun, Pollack, Pollack, Schlichting, Sheppard, Thommes, Tremaine, Tsiganis, Tsui, Vokrouhlicky   +52 more
core   +3 more sources

Ceres: Organic‐Rich Sites of Exogenic Origin?

AGU Advances, Volume 6, Issue 1, February 2025.
Abstract Ceres, the largest object in the asteroid belt, is the only potential ocean world in the inner Solar System. Previous studies identified deposits of aliphatic organics in and around the Ernutet crater, and at small locations at Inamahari and Urvara craters. The origin of organics, either endogenic or exogenic, in these fresh exposures is still
R. Sarkar, A. Nathues, M. Hoffmann, E. Cloutis, K. Mengel, P. Singh, G. Thangjam, J. Hernandez, S. Karunatillake, M. Coutelier   +9 more
wiley   +1 more source