Results 41 to 50 of about 1,894,855 (142)

A new look at the Oort Cloud to Scattered Disc population ratio [PDF]

, 2011
Workshop program and abstracts available at: http://lal.univ-lille1.fr/oort_workshop_prog.htmlClassical simulations of the formation and evolution of the Oort cloud generally encounter two problems.
Morbidelli, Alessandro, Brasser, Ramon
core   +1 more source

Gravitational Time Potential Energy

Advances in Astronomy, Volume 2026, Issue 1, 2026.
We extend the Einstein equivalence principle via a supplementary local energy equivalence postulate and propose the gravitational time potential energy (GTP) framework: a time‐dimensional scalar potential accumulating continuously with the proper duration of gravitational action. This framework may provide a potential classical interpretation for alpha
Ne Allen, Mohammad Rezwan Habib
wiley   +1 more source

Notes on the outer-Oort-cloud formation efficiency in the simulation of Oort cloud formation

, 2009
Aims. The formation efficiency of the outer Oort cloud, obtained in the simulation performed in our previous work, appeared to be very low in a comparison with the corresponding results of other authors.
P. A. Dybczyński, M. Jakubík, L. Neslušan, T. Paulech, G. Leto   +4 more
core   +1 more source

No Influence of Passing Stars on Paleoclimate Reconstructions Over the Past 56 Million Years

The Astronomical Journal
Passing stars (also called stellar flybys) have notable effects on the solar system’s long-term dynamical evolution, injection of Oort cloud comets into the solar system, properties of trans-Neptunian objects, and more. Based on a simplified solar system
Richard E. Zeebe, David M. Hernandez
doaj   +1 more source

A novel high‐throughput digital morphological phenotyping method for evaluating growth traits in rice

The Plant Phenome Journal, Volume 8, Issue 1, December 2025.
Abstract High‐throughput and noninvasive phenotyping methods are promising technology for improving efficiency in plant research and breeding. In this study, we evaluated the performance of a digital phenotyping system (DPS) based on three‐dimensional (3D) model reconstruction for quantifying key growth traits in rice (Oryza sativa).
Sorawich Pongpiyapaiboon, Kenji Aoki, Masatsugu Hashiguchi, Ryo Akashi, Yuji Kishima, Hidenori Tanaka   +5 more
wiley   +1 more source

The formation of periodic three-body orbits for Newtonian systems

Astronomy & Astrophysics
Context. Braids are periodic solutions to the general N-body problem in gravitational dynamics. These solutions seem special and unique but may result from rather usual encounters between four bodies. Aims.
Portegies Zwart Simon, Doelman Arjen, Sein Jelmer   +2 more
doaj   +1 more source

A Thermal Origin to the Asymmetry of the Permanent Dust Cloud at the Moon

Journal of Geophysical Research: Planets, Volume 130, Issue 10, October 2025.
Abstract The Moon's surface, lacking an atmosphere, is continually bombarded by high‐speed micro‐meteoroids, creating a highly porous regolith composed of very fine grains. This regolith's porosity decreases with depth due to compression. Besides creating vapor and melt, micro‐meteoroid impacts eject lunar dust, redistributing regolith grains, which ...
Sébastien Verkercke, Cem Berk Senel, Robert Luther, Menelaos Sarantos, Elena Martellato, Gareth S. Collins, Lisa Krämer Ruggiu, Steven Goderis, Özgür Karatekin, Philippe Claeys   +9 more
wiley   +1 more source

Sedna and the Oort Cloud around a migrating Sun [PDF]

, 2011
Recent numerical simulations have demonstrated that the Sun's dynamical history within the Milky Way may be much more complex than that suggested by its current low peculiar velocity (Sellwood, J.A., Binney, J.J. [2002]. Mon. Not. R. Astron. Soc.
Roškar, R, Rok Roškar, Nathan A. Kaib, Thomas Quinn, Quinn, T, Kaib, N A   +5 more
core   +1 more source

Vision at high latitudes: High sensitivity without specific boreal adaptations in photoreception in reindeer (Rangifer tarandus L.)

Functional Ecology, Volume 39, Issue 10, Page 2573-2587, October 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The light climate at high latitudes, in particular the extended twilight of winter and the reduced diel variation in light level in midsummer and midwinter, potentially constrains visual function and the synchronisation of temporal organisation in polar species. In this
Nicholas J. C. Tyler, Robert A. E. Fosbury, David Hazlerigg, Christopher Hogg   +3 more
wiley   +1 more source

Analytical Solutions for Planet-scattering Small Bodies

The Astronomical Journal
Gravitational scattering of small bodies (planetesimals) by a planet remains a fundamental problem in celestial mechanics. It is traditionally modeled within the circular restricted three-body problem, where individual particle trajectories are obtained ...
Yukun Huang, Brett Gladman, Eiichiro Kokubo   +2 more
doaj   +1 more source