Results 31 to 40 of about 1,075,136 (370)

Design and Research Co-Simulation Platform of Navigation and Dynamics on Planetary Rovers

Xibei Gongye Daxue Xuebao, 2019
The overall design idea of simulation platform of the planetary rover coupling navigation and dynamics is proposed to address the dilemma faced in the design of a navigation control system for Mars and other planetary exploration tasks.

doaj   +1 more source

Stability and Formation of the Resonant System HD 73526 [PDF]

, 2007
Based on radial velocity measurements it has been found recently that the two giant planets detected around the star HD 73526 are in 2:1 resonance. However, as our numerical integration shows, the derived orbital data for this system result in chaotic ...
Beaugé, Bois, Calvet, Crida, D'Alessio, de Val-Borro, Ford, Hayashi, Kley, Kley, Kley, Kley, Lee, Lee, Masset, Michtchenko, P. Klagyivik, Perryman, Pollack, Psychoyos, Rivera, Sándor, Sándor, Tinney, Vogt, W. Kley, Zs. Sándor   +26 more
core   +2 more sources

The 1:1 resonance in Extrasolar Systems: Migration from planetary to satellite orbits

, 2011
We present families of symmetric and asymmetric periodic orbits at the 1/1 resonance, for a planetary system consisting of a star and two small bodies, in comparison to the star, moving in the same plane under their mutual gravitational attraction.
A. Morbidelli, A.W. Smith, C. Beaugé, C. Beaugé, C. Beaugé, C. Marchal, C.A. Giuppone, C.D. Murray, C.G. Zagouras, G. Voyatzis, G. Voyatzis, G. Voyatzis, George Voyatzis, J.C.B. Papaloizou, J.D. Hadjidemetriou, J.D. Hadjidemetriou, J.D. Hadjidemetriou, J.D. Hadjidemetriou, J.D. Hadjidemetriou, John D. Hadjidemetriou, L.S. Pars, R. Schwarz, R.P. Nelson, R.P. Nelson, R.S. Gomes, S. Ferraz-Mello, S. Ferraz-Mello, S. Mikkola, Z. Makó   +28 more
core   +1 more source

Planetary systems in a star cluster I: the Solar system scenario [PDF]

, 2019
Young stars are mostly found in dense stellar environments, and even our own Solar system may have formed in a star cluster. Here, we numerically explore the evolution of planetary systems similar to our own Solar system in star clusters. We investigate the evolution of planetary systems in star clusters.
arxiv   +1 more source

A New Framework for Generating Indoor 3D Digital Models from Point Clouds

Remote Sensing
Three-dimensional indoor models have wide applications in fields such as indoor navigation, civil engineering, virtual reality, and so on. With the development of LiDAR technology, automatic reconstruction of indoor models from point clouds has gained ...
Xiang Gao, Ronghao Yang, Xuewen Chen, Junxiang Tan, Yan Liu, Zhaohua Wang, Jiahao Tan, Huan Liu   +7 more
doaj   +1 more source

Is our Sun a Singleton?

, 2007
Most stars are formed in a cluster or association, where the number density of stars can be high. This means that a large fraction of initially-single stars will undergo close encounters with other stars and/or exchange into binaries.
Adams F C, Binney J, D Mackey, D Malmberg, F De Angeli, Fabrycky D Tremaine S, Ford E B Rasio F A, Holman M J, J E Chambers, M B Davies, M I Wilkinson, Malmberg D Davies M B, Marzari F, Mazeh T, Pfahl E, Portegies Zwart S F, R P Church, Takeda G, Wu Y Murray N W Ramsahi J M   +18 more
core   +1 more source

The birth environment of planetary systems [PDF]

Royal Society Open Science, 2020
Star and planet formation are inextricably linked. In the earliest phases of the collapse of a protostar, a disc forms around the young star and such discs are observed for the first several million years of a star’s life. It is within these circumstellar, or protoplanetary, discs that the first stages of planet formation occur.
openaire   +6 more sources

Dynamical Habitability of Planetary Systems [PDF]

Astrobiology, 2010
The problem of the stability of planetary systems, a question that concerns only multiplanetary systems that host at least two planets, is discussed. The problem of mean motion resonances is addressed prior to discussion of the dynamical structure of the more than 350 known planets.
Dvorak, Rudolf, Pilat-Lohinger, Elke, Bois, Eric, Schwarz, Richard, Funk, Barbara, Beichman, Charles, Danchi, William, Eiroa, Carlos, Fridlund, Malcolm, Henning, Thomas, Herbst, Tom, Kaltenegger, Lisa, Lammer, Helmut, Léger, Alain, Liseau, René, Lunine, Jonathan, Paresce, Francesco, Penny, Alan, Quirrenbach, Andreas, Röttgering, Huub, Selsis, Franck, Schneider, Jean, Stam, Daphne, Tinetti, Giovanna, White, Glenn J.   +24 more
openaire   +6 more sources

Planetary Nebulae Populations in External Galaxies [PDF]

, 2011
This review highlights the properties of the planetary nebulae in external galaxies as tracers of light, of the stellar population properties, and of the distances and kinematics of the parent galaxies. Recent results on the kinematics of the outer regions in giant elliptical galaxies and on the luminosity specific PN numbers (the \alpha\ parameter) in
arxiv   +1 more source

Stability and self-organization of planetary systems [PDF]

Phys. Rev. E 97, 042221 (2018), 2018
We show that stability of planetary systems is intimately connected with their internal order. An arbitrary initial distribution of planets is susceptible to catastrophic events in which planets either collide or are ejected from the planetary system.
arxiv   +1 more source