scholarly journals The precession of Mercury’s orbit

2019 ◽  
Vol 489 (6) ◽  
pp. 570-575
Author(s):  
N. I. Amel’kin
Keyword(s):  
Solar System ◽  
Classical Mechanics ◽  
Relative Accuracy ◽  
Observation Data ◽  
Total Amplitude

Within the framework of classical mechanics the influence of the planets in the solar system to the precession of the orbit of Mercury is investigated. It is shown that the average offset of the perihelion of mercurys orbit computed within the flat limited tasks is 556,5 angular seconds per century and coincides with the observation data with relative accuracy of 2,5%. Incomplete overlap between the computed average offset and observations can be explained by the presence in observations offset oscillatory components with a total amplitude up to 20 angular seconds and periods from several years to several decades.

scholarly journals Simulations of Switchback, Fragmentation and Sunspot Pair in δ-Sunspots during Magnetic Flux Emergence

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 586
Author(s):  
Che-Jui Chang ◽  
Jean-Fu Kiang
Keyword(s):  
Magnetic Field ◽  
Solar System ◽  
Field Strength ◽  
Magnetic Flux ◽  
Initial Conditions ◽  
Observation Data ◽  
Flux Emergence ◽  
Polarity Inversion ◽  
Simulation Results ◽  
Spot Type

Strong flares and coronal mass ejections (CMEs), launched from δ-sunspots, are the most catastrophic energy-releasing events in the solar system. The formations of δ-sunspots and relevant polarity inversion lines (PILs) are crucial for the understanding of flare eruptions and CMEs. In this work, the kink-stable, spot-spot-type δ-sunspots induced by flux emergence are simulated, under different subphotospheric initial conditions of magnetic field strength, radius, twist, and depth. The time evolution of various plasma variables of the δ-sunspots are simulated and compared with the observation data, including magnetic bipolar structures, relevant PILs, and temperature. The simulation results show that magnetic polarities display switchbacks at a certain stage and then split into numerous fragments. The simulated fragmentation phenomenon in some δ-sunspots may provide leads for future observations in the field.

Pattern Formation by Inelastic Collisions, Especially in Planetary Systems

1998 ◽  
Vol 12 (03) ◽  
pp. 309-360
Author(s):  
Toshio Kawai
Keyword(s):  
Solar System ◽  
Inelastic Collision ◽  
Classical Mechanics ◽  
Planetary Systems ◽  
Gravitational Effect ◽  
Particle Systems ◽  
Inelastic Collisions ◽  
One Dimensional ◽  
Planetary Problem ◽  
History Of

The Titius–Bode law governs the planet distribution in our Solar system. In this paper a possible explanation is proposed based on inelastic collision effects among planetessimals during the evolution of the Solar system. The main purpose of this paper is, however, to introduce a strategy to study phenomena driven by rare but drastic events such as colllisions in the planetary problem. Many complex systems evolve through rare but violent events, so that an efficient strategy to simulate such systems is desirable. An event-driven strategy is proposed in this article, and is used to produce many runs of 108 year evolution history of planetary systems. I have found that the Titius–Bode law holds approximately, if the gravitational effect (scattering) and the collisions are taken into account. The result illustrates the importance of inelastic collisions, which are often neglected in the standard classical mechanics courses. Therefore, for completeness, other simpler particle systems under the effect of inelastc collisions, such as one-dimensional systems, are also included.

Neural network modeling of jointed rock mass behavior in topocentric terrestrial field: A case study of Oktyabrsky deposit

2021 ◽  
pp. 69-74
Author(s):  
M. P. Sergunin ◽  
Keyword(s):  
Neural Network ◽  
Rock Mass ◽  
Solar System ◽  
Laser Scanning ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Neural Network Modeling ◽  
Observation Data ◽  
Term Operation ◽  
Mass Behavior

The article addresses a promising geomechanical trend connected with Big Data processing. Using helium release observation results, the jointed rock mass behavior in the terrestrial field is studied. The terrestrial field is assumed as a variable value governed by the positions of the major planets in the Solar system, as well as by the positions of the Moon and Sun. The observation data are used for neural network learning. The total bulk of the learning data was more than 95 thousands of observations. After learning, the neural network decision-making algorithm was analyzed, and the studies were compared with the rock mass jointing analysis data from 3D modeling of Oktyabrsky and Talnakh deposits. Interpretation of frames of faults in the study area produced more than 206 thousands of measurements of precise dip angles and strike orientations with their distribution in depth and along the horizontal. Alongside with the fault frame interpretation, helium release data were compared with roughness of walls in a vertical opening sunk in the close vicinity of the measurement site. As a result of long-term operation, the shape of the opening repeats the block structure of enclosing rock mass and, thus, can inform on its initial jointing. The wall roughness data were obtained using laser scanning and contained more than 106 thousands of measurements. The analysis and processing of all data reveals the dependence between the planetary positions in the Solar system, helium release, orientation of the main joint system and surface roughness in underground openings. In this manner, it is possible to assess deformation processes in the crust and to find their influence on rock mass behavior.

Introductory remarks

1984 ◽  
Vol 313 (1524) ◽  
pp. 3-4
Keyword(s):  
Angular Momentum ◽  
Solar System ◽  
Magnetic Flux ◽  
Inertial Frame ◽  
Dominant Role ◽  
Classical Mechanics ◽  
Conducting Material ◽  
Dynamo Action ◽  
General Aspects ◽  
The Universe

One of the most obvious features of the Solar System is that everything in it is rotating in one way or another. Any observer might simply be curious as to how all these bodies come to be spinning as they appear to be. But in classical mechanics which for the most part is the only sort of mechanics with which we shall be concerned for the purposes of this discussion - spin is normally defined relative to an inertial frame. As such it is an absolute feature, denoting a link with the rest of the Universe. So the observer’s curiosity concerns what must be very significant properties of the system; its pursuit may be expected to earn very significant rewards. The contributions to be presented promise to justify this expectation. All the rotations in the Solar System must of course depend ultimately on the mechanism of its formation. It would be all too easy to devote a disproportionately large part of the programme to this one topic. Equally, it would be ridiculous to include nothing about the origin of the System. As it is, two papers will deal with aspects in which rotation plays a dominant role; no doubt, however, there must throughout be many allusions to problems of origins. Another theme that might have become dominant is magnetism in the Solar System. For rotation and convection in conducting material in the System must in general produce dynamo action; the resulting magnetic flux must then in general result in some transfer of angular momentum. Such effects are presumably widespread. One paper will deal with their general aspects; particular applications will figure more or less prominently in several others.

scholarly journals What they don’t teach you at Harvard-Smithsonian In search of Navier-Stokes model of the Solar System

2021 ◽  
Keyword(s):  
Solar System ◽  
Low Temperature ◽  
Large Scale ◽  
Quantized Vortices ◽  
Navier Stokes ◽  
Observation Data ◽  
Superfluid Turbulence ◽  
Quantization Rule ◽  
Planetary Orbits ◽  
Superfluid Vortices

In this paper, we will discuss shortly a nonlinear cosmology model inspired by analogy between cosmology phenomena and low temperature physics, especially superfluid vortices dynamics. We described: (a) a nonlinear cosmology model based on Navier-Stokes turbulence equations, which then they are connected to superfluid turbulence, and (b) the superfluid turbulence can lead to superfluid quantized vortices, which can be viewed as large scale version of Bohr’s quantization rule, and (c) this superfluid quantized vortice interpretation of Bohr’s rule allow us to predict quantization of planetary orbits in solar system including new possible orbits beyond Pluto. This paper is intended as a retrospect of what happened after the publication of earlier papers, and also some related ideas we developed since that time. In the second section we also discuss a recent development in matter-creation hypothesis, by virtue of unmatter concept and its extension. It is our hope that the new proposed view will inspire younger physicists and cosmologists to develop more realistic nonlinear cosmology models. And although some of our predictions since 2004 have come to observed data, we also hope the ideas presented here can be further verified with observation data.

scholarly journals PENGGUNAAN MEDIA PERMAINAN MONOPOLI MELALUI PEMBELAJARAN KOOPERATIF PADA MAHASISWA FISIKA FAKULTAS TARBIYAHDENGAN KONSEP TATA SURYA

2013 ◽  
Vol 13 (2) ◽  
Author(s):  
Fitriyawany Fitriyawany
Keyword(s):  
Solar System ◽  
Cooperative Learning ◽  
Learning Outcomes ◽  
Positive Impact ◽  
Observation Data ◽  
Quasi Experimental ◽  
And Performance ◽  
Academic Year ◽  
Positive Results

The conducted study concerns about the use of Monopoly game as media in Cooperative Learning on the concept of the Solar System for Students of Physics in Tarbiyah faculty aiming to see the students' mastery of learning outcomes and performance. The study was a Quasi Experimental Research. The population used in the study was all students majoring in Physic Education with a sample of the7th semester students of 2010/2011 academic year. The method of data collection used is testing and observation. Data were analyzed by using the statistical percentage. The result shows there were 90.32% of students passed individually, which therefore the students' learning results were completed classically. In addition, the students' performance on cognitive, affective, and psychomotor in the experimental class also showed positive results. Therefore, it can be concluded that the use of monopoly game as media in cooperative learning on the concept of the Solar System have a positive impact to the quality of learning process.

Dynamical simulation of the motion of Leonid Meteoric Stream

2002 ◽  
Vol 11 (07) ◽  
pp. 1021-1034 ◽  
Author(s):  
Guangyu Li ◽  
Haibin Zhao
Keyword(s):  
Solar System ◽  
Main Part ◽  
Pressure Effect ◽  
Gravitational Effect ◽  
Observation Data ◽  
The Moon ◽  
Dynamical Simulation ◽  
The Earth ◽  
Leonids 1998 ◽  
Second Peak

The Leonid meteoric shower has been the most famous meteoric shower. The main characteristics of the stream are well known, being very spectacular displays in recent years. In this paper, the authors aim at searching the dynamic origin of the second peak of Leonids 1998. Firstly a dynamic model of the solar system is constructed, considering the perturbations of the nine major planets and the Moon, Post-Newtonian effects and the figure effect of the Earth. For the motions of cornet and meteoroid, the non-gravitational effect and radiation pressure effect are taken into account separately. Secondly, the orbit of Comet Tempel-Tuttle is determined by using the observation data of this apparition. Finally, assuming an isotropic ejection model of comet, the authors simulate the motion of the meteoric stream and discover that the particles aged 2-revolutions erupted with velocity 50m/s can befall Earth at 20h37m UT of Nov. 17, 1998, which form the main part of the second peak of Leonids 1998.

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

The Origin of the Moon and its Relationship to the Origin of the Solar System

1962 ◽  
Vol 14 ◽  
pp. 133-148 ◽  
Author(s):  
Harold C. Urey
Keyword(s):  
Solar System ◽  
The Moon ◽  
The Past ◽  
The Earth ◽  
Short Period ◽  
Origin Of The Moon

During the last 10 years, the writer has presented evidence indicating that the Moon was captured by the Earth and that the large collisions with its surface occurred within a surprisingly short period of time. These observations have been a continuous preoccupation during the past years and some explanation that seemed physically possible and reasonably probable has been sought.

Stellar Evolution

1962 ◽  
Vol 11 (02) ◽  
pp. 137-143
Author(s):  
M. Schwarzschild
Keyword(s):  
Solar System ◽  
Stellar Evolution ◽  
Space Craft ◽  
New Techniques ◽  
Substantial Body ◽  
Individual Stars ◽  
The Past ◽  
Evolution Of Galaxies ◽  
History Of ◽  
Fast Flow

It is perhaps one of the most important characteristics of the past decade in astronomy that the evolution of some major classes of astronomical objects has become accessible to detailed research. The theory of the evolution of individual stars has developed into a substantial body of quantitative investigations. The evolution of galaxies, particularly of our own, has clearly become a subject for serious research. Even the history of the solar system, this close-by intriguing puzzle, may soon make the transition from being a subject of speculation to being a subject of detailed study in view of the fast flow of new data obtained with new techniques, including space-craft.

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