Results 31 to 40 of about 1,052,332 (366)

Origin and Formation of Planetary Systems [PDF]

open access: yesAstrobiology, 2010
To estimate the occurrence of terrestrial exoplanets and maximize the chance of finding them, it is crucial to understand the formation of planetary systems in general and that of terrestrial planets in particular. We show that a reliable formation theory should not only explain the formation of the Solar System, with small terrestrial planets within a
Huub Röttgering   +26 more
openaire   +8 more sources

Conceptual Design of Rover’s Mobility System for Ground-Based Model [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
In recent years, lots of studies on the planetary rover systems have been performed around space advanced agencies such as NASA, ESA, JAXA, etc. Among the various technologies for the planetary rover system, the mobility system, navigation algorithm ...
Youn-Kyu Kim   +4 more
doaj   +1 more source

Development of fault diagnosis system for wind power planetary transmission based on labview

open access: yesThe Journal of Engineering, 2019
The article uses LabView to develop a fault diagnosis system for wind power planetary transmissions. First, use LabView software to create a signal acquisition system.
Zhihan Yang   +3 more
doaj   +1 more source

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

open access: yes, 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

Stability and self-organization of planetary systems [PDF]

open access: yesPhys. 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

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

open access: yes, 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   +28 more
core   +1 more source

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

open access: yesRemote 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   +7 more
doaj   +1 more source

Planetary Nebulae Populations in External Galaxies [PDF]

open access: yes, 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

Preliminary Analysis of Planetary Characteristics, Dynamics, and Climates from the Systems Alliance Planetary Survey Catalogue [PDF]

open access: yesarXiv, 2021
Just a few decades after the discovery of the Charon Relay, and the ensuing First Contact War, relatively little is known about the population of planets linked by the Prothean mass relays. Understanding the nature of these systems and how they may differ from the broader population of planetary systems in our galaxy is key to both continued human ...
arxiv  

Is our Sun a Singleton?

open access: yes, 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   +18 more
core   +1 more source

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