Results 51 to 60 of about 306,106 (208)
Tectonics and volcanisms of Mars [PDF]
Televised images of Mars transmitted from interplanetary stations are used to develop a theory of the structure and development of the planet. Crater chronology, the structure of planetary bodies in the Earth group, and a comparison of the Earth ...
Kats, Y. G. +3 more
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A Squirrel-cage Globoidal Cam Planetary Mechanism
Jixie chuandong, 2020 The globoidal cam planetary mechanism is difficult to machine， the assembly precision is difficult to guarantee， and its manufacturing cost is high. These problems are caused by the toroidal structure of the outer annulus cam. A new type of squirrel-cage
Gong Yan, Cao Jujiang, Zhang Yanhua
doaj
Planetary Gearbox Vibration Signal Characteristics Analysis and Fault Diagnosis
Shock and Vibration, 2015 Planetary gearboxes are widely used in helicopters, wind turbines, mining machinery, and so forth. The structure and motion type of a planetary gearbox are more complex in comparison with a fixed-shaft one, which makes condition monitoring and fault ...
Qiang Miao, Qinghua Zhou
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Multiple outflows in the planetary nebula NGC 6058
, 2013 We present narrow-band [O III]lambda5007 and H-alpha images, as well as long-slit high-resolution echelle spectra of the planetary nebula NGC 6058. Our data reveal that NGC 6058 is a multipolar planetary nebula of about ~45 arcsec in extent and formed by
Ayala, S. +6 more
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Tilting Jupiter (a bit) and Saturn (a lot) During Planetary Migration [PDF]
, 2015 We study the effects of planetary late migration on the gas giants obliquities. We consider the planetary instability models from Nesvorny & Morbidelli (2012), in which the obliquities of Jupiter and Saturn can be excited when the spin-orbit resonances ...
Nesvorny, David, Vokrouhlicky, David
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Modeling and Dynamics Analysis Belt Drive in Planetary Transmission System
Jixie chuandong, 2015 For the problem of planetary transmission system that the complex system structure in the course of using,high manufacture precision and limitations strong during long-distance power transmission process.According to the traditional characteristics of ...
Qi Xuemei
doaj
H- and He-burning central stars and the evolution to white dwarfs
, 2002 The structure and evolution of central stars of planetary nebulae (CSPNe) is reviewed. CSPNe represent the rapid transitional stage between the Asymptotic Giant Branch (AGB) and the white-dwarf domain.
Bloecker, T.
core +1 more source
Planetary origin, evolution, and structure [PDF]
Three areas of recent and ongoing research are presented. The first area is giant planet heatflows. Conventional wisdom attributes the heatflow of the giant planets to the gradual loss of primordial heat, except in the case of Saturn where helium ...
Stevenson, David J.
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The Planetary Nebula Luminosity Function: Pieces of the Puzzle
, 2009 Extragalactic surveys in the emission line of [O III] 5007 have provided us with the absolute line strengths of large, homogeneous sets of planetary nebulae.
Balick +7 more
core +1 more source
The Astrophysical JournalOur work was aimed at the improvement of two main already existing methods of porosity calculation on a planetary scale in order to expand these methods to be applicable to exoplanetary interiors. In addition to implementing some improvements in the used
Imre Kisvárdai, Ákos Kereszturi
doaj +1 more source