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The known extrasolar planets exhibit many interesting and surprising features--extremely short-period orbits, high-eccentricity orbits, mean-motion and secular resonances, etc.--and have dramatically expanded our appreciation of the…

Astrophysics · Physics 2009-11-10 Scott Tremaine , Nadia L. Zakamska

The possible discovery of astronomical effects due to precession - such as the shift in the declination of heliacal raising of bright stars or the precession of the equinoxes - is reviewed for various ancient cultures in the world. Although…

History and Philosophy of Physics · Physics 2007-05-23 Giulio Magli

Finite projective (lattice) geometries defined over rings instead of fields have recently been recognized to be of great importance for quantum information theory. We believe that there is much more potential hidden in these geometries to…

Mathematical Physics · Physics 2010-01-13 Metod Saniga , Petr Pracna

Comets, asteroids and moons that orbit stars and planets exterior to our solar system are prefixed with "exo". While the existence of these objects is certain, our understanding of their physical properties, composition, and diversity is…

Earth and Planetary Astrophysics · Physics 2024-10-10 Paul A. Strøm

The Canadian Automated Meteor Observatory (CAMO) detects occasional meteors with two maxima in the image intensified CCD based light curves. We report early results from an analysis of 21 of these events. Most of these events show…

Earth and Planetary Astrophysics · Physics 2014-02-26 I. D. Roberts , R. L. Hawkes , R. J. Weryk , M. D. Campbell-Brown , P. G. Brown , E. Stokan , D. Subasinghe

Over the past few decades, various conjectures were advanced that Saturn's rings are Cantor-like sets, although no convincing fractal analysis of actual images has ever appeared. We focus on the images sent by the Cassini spacecraft…

Earth and Planetary Astrophysics · Physics 2012-07-03 Jun Li , Martin Ostoja-Starzewski

A verse in book I of Rigveda mentions a cosmic tree with rope-like aerial roots held up in the sky. Such an imagery might have ensued from the appearance of a comet having `tree stem' like tail, with branched out portions resembling aerial…

History and Philosophy of Physics · Physics 2019-02-04 Patrick Das Gupta

The main steps of the process of obtaining the result [1] in terms of elliptic polylogarithms for a two-loop sunrise integral with two different internal masses with pseudothreshold kinematics for all orders of the dimensional regulator are…

High Energy Physics - Phenomenology · Physics 2023-07-12 A. V. Kotikov

Hyperfields and systems are two algebraic frameworks which have been developed to provide a unified approach to classical and tropical structures. All hyperfields, and more generally hyperrings, can be represented by systems. Conversely, we…

Rings and Algebras · Mathematics 2023-04-28 Marianne Akian , Stephane Gaubert , Louis Rowen

In this note we show that the configuration spaces of the kinematic system constructed in [4] and [12] gives rise to a natural tower of sphere bundles. Moreover, we prove that, each tower of projective bundles associated to special multi-…

Differential Geometry · Mathematics 2013-08-08 Fernand Pelletier

For many decades scholars converse how to correctly include the Old Babylonian Empire into the absolute timeline of history. A cuneiform text from the series Enuma Anu Enlil (EAE #20) reports on the destruction of Babylon after a lunar and…

History and Philosophy of Physics · Physics 2020-07-15 Emil Khalisi

There are at least three compelling reasons for the human race to initiate a major programme to explore and better understand the 'minor planets' of the Solar System: (1) Enhancing scientific knowledge; (2) Mitigating the impact hazard; and…

Earth and Planetary Astrophysics · Physics 2013-06-13 Ian A. Crawford

This paper describes briefly a mathematical model that relates the parameters of celestial bodies motion in the spheres of activity of the Sun and the Earth with mass-energy characteristics of these celestial bodies and their explosion…

Earth and Planetary Astrophysics · Physics 2014-04-01 Yu. I. Lobanovsky

Seismology applied to giant planets could drastically change our understanding of their deep interiors, as it has happened with the Earth, the Sun, and many main-sequence and evolved stars. The study of giant planets' composition is…

Earth and Planetary Astrophysics · Physics 2022-03-08 Patrick Gaulme , Benoit Mosser , Francois-Xavier Schmider , Tristan Guillot , Jason Jackiewicz

Clusters of galaxies, filled with hot magnetized plasma, are the largest bound objects in existence and an important touchstone in understanding the formation of structures in our Universe. In such clusters, thermal conduction follows field…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Christoph Pfrommer , L. Jonathan Dursi

Pearls, the most flawless and highly prized of them, are perhaps the most perfectly spherical macroscopic bodies in the biological world. How are they so round? Why are other pearls solids of revolution (off-round, drop, ringed), and yet…

Adaptation and Self-Organizing Systems · Physics 2014-11-20 Julyan H. E. Cartwright , Antonio G. Checa , Marthe Rousseau

The physical composition and structure of meteoroids gives us insight into the formation processes of their parent asteroids and comets. The strength of and fundamental grain sizes in meteoroids tell us about the environment in which small…

Earth and Planetary Astrophysics · Physics 2019-04-10 Margaret D. Campbell-Brown

Cosmology, high-energy physics and astrophysics are converging on the study of large-scale magnetic fields. While the experimental evidence for the existence of large-scale magnetization in galaxies, clusters and superclusters is rather…

Astrophysics · Physics 2009-11-10 Massimo Giovannini

Hermitian symmetric manifolds are Hermitian manifolds which are homogeneous and such that every point has a symmetry preserving the Hermitian structure. The aim of these notes is to present an introduction to this important class of…

Differential Geometry · Mathematics 2014-08-22 Filippo Viviani

Cosmology from the Top Down.

Astrophysics · Physics 2007-05-23 Stephen Hawking
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