Results 31 to 40 of about 3,516,371 (307)
Dynamical interactions in the planetary system GJ4276 [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT GJ4276 is an M4.0 dwarf star with an inferred Neptune mass planet from radial velocity (RV) observations. We re-analyse the RV data for this system and focus on the possibility of a second, super-Earth mass, planet. We compute the time-scale for fast resonant librations in the eccentricity to be $\sim \!2000 \, \mathrm{d ...
Fergus Horrobin, Hanno Rein
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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.
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DYNAMIC MODEL OF A HORIZONTAL PLANETARY MILL
Mechanics of Machines, Mechanisms and Materials, 2022 Issues are considered that are associated with the determination of dynamic loads encountered in moving units of the planetary mill. A horizontal planetary mill was chosen for compiling a dynamic model, as it has a great potential for organizing a closed grinding cycle with continuous loading and unloading of material. Calculation schemes were drawn up
Gennadiy M. Khves’ko +2 more
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Testing proposed planetary systems - to destruction [PDF]
, 2014 The authors examine the dynamics of exoplanet systems and find that some of them don't last long.
Horner, J. +4 more
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Orbital forcing of ice sheets during snowball Earth
Nature Communications, 2021 Reconciling the Snowball Earth hypothesis with sedimentological cyclicity has been a persistent challenge. A new cyclostratigraphic climate record for a Cryogenian banded iron formation in Australia provides evidence for orbital forcing of ice sheet ...
Ross N. Mitchell +8 more
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Eos, Transactions American Geophysical Union, 1971 Under planetary dynamics we include precise range determinations and improvements in the ephemerides, new ideas and tests of general relativity, tidal evolution of planetary spins and the orbit of the moon, commensurabilities in the solar system, and several selected topics dealing with unusual or long standing problems.
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On the dynamics of comets in extrasolar planetary systems [PDF]
, 2020 Since very recently, we acquired knowledge on the existence of comets in extrasolar planetary systems. The formation of comets together with planets around host stars now seems evident. As stars are often born in clusters of interstellar clouds, the interaction between the systems will lead to the exchange of material at the edge of the clouds ...
Dvorak, Rudolf +2 more
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Misalignment diagnosis of a planetary gearbox based on vibration analysis [PDF]
, 2014 As a critical power transmission system, planetary gearbox is widely used in many industrial important machines such as wind turbines, aircraft turbine engines, helicopters.
Gu, Fengshou +4 more
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Determination of Jupiter’s Pole Orientation from Juno Radio Science Data
AerospaceThe extreme accuracy of Juno radio science data allows us to perform very precise orbit determination experiments. While previous works focused on the estimation of the gravitational field of Jupiter, in this article, we aim to accurately determine the ...
Giacomo Lari +4 more
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Nature Communications, 2023 Argyle is the world’s largest source of natural diamonds, yet one of only a few economic deposits hosted in a Paleoproterozoic orogen. The geodynamic triggers responsible for its alkaline ultramafic volcanic host are unknown. Here we show, using U-Pb and
Hugo K. H. Olierook +14 more
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