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...device for converting rotational motion to linear motion, or vice versa. Planetary roller screws are used as the actuating mechanism in many electromechanical ...f [[Gear#Sun and planet|planet gears to sun gear]]), and are thus known as planetary, or satellite, rollers. As with a lead screw or ball screw, rotation of th ...

...t8=Roland|date=2020-04-03|title=Baroclinic and barotropic instabilities in planetary atmospheres: energetics, equilibration and adjustment|url=https://npg.coper ...mean current and travel along the coast of Africa. The formation of these rings is a manifestation of a barotropic instability.<ref>{{Cite journal|last1=We ...

...While no firm theoretical understanding as to how toroidal planets could [[Planetary formation|form naturally]] is necessarily known, the shape itself is potent ...ff, Stefan Horatschek |title=Uniformly rotating homogeneous and polytropic rings in Newtonian gravity |journal=Monthly Notices of the Royal Astronomical Soc ...

!colspan=4|Planetary Gearset: Teeth{{efn|'''Layout''' *Planetary gearset 4 is on the input (turbine) side ...

...round moons are shown in order of their distance.| caption1 = Saturn, its rings and major icy moons—from Mimas to Rhea.}} ...h such systems may also consist of bodies such as circumplanetary disks, [[Planetary ring|ring systems]], [[moonlet]]s, [[minor-planet moon]]s and [[artificial ...

...: Pluto's small moons Styx, Nix, Kerberos, and Hydra [UPDATED]|website=www.planetary.org}}</ref> ...9 from Outer Space – Pluto Geology and Geochemistry|publisher=[[Lunar and Planetary Institute]]|website=[[YouTube]]|date=25 March 2016|access-date=27 May 2019} ...

...phenomena of micrometeorites on lunar surface material |journal=Earth and Planetary Science Letters |date=March 1970 |volume=9 |issue=1 |page=31 |doi=10.1016/0 ...orm electric field along the accelerating column. This beam line of glass rings is simply supported by compression at either end of the terminal. As the g ...

...h, and the process of perturbation of ordinary (terrene) solar objects, by planetary encounters, into hyperbolic trajectories accounts for all of those. Beech c ...|Atluri|Libby|1965}}, having studied worldwide levels of carbon-14 in tree rings and noticing unusually high levels for the year 1909. However, even in 1958 ...

...analysis of [[perturbation series]] describing [[3-body problem|3-body]] [[planetary motion]]. The first-order terms in the perturbative series can be understoo ...=Adrian Edmund |last2=Gill |year=1967 |title=Resonant interactions between planetary waves |journal=Proceedings of the Royal Society A |volume=299 |issue=1456 | ...

...ial tilt with respect to the ecliptic.}} to [[ecliptic]] (if coplanar with rings) ...ar outside its [[Roche limit]], which defies theoretical expectations that rings outside the Roche limit should not be stable.<ref name="Pereira2023"/> ...

...-11-11}}</ref> allowing each of the gearsets 1, 2, and 4 to use only three planetary gears.<ref>{{cite web |url=https://www.jatco.co.jp/wp-jatco/wp-content/them | 4<br>4{{efn|of which 2 gearsets are combined as a compound [[Ravigneaux planetary gearset|Ravigneaux gearset]]}} ...

...itle = A Theoretical Study of the Stability of Disk Galaxies and Planetary Rings. PhD Thesis, MIT ...

...ial atmosphere. The 2017 occultation also showed no signs of [[ring system|rings]] within {{cvt|10000|km|mi}} from Vanth or beyond {{cvt|8010|km|mi}} from O ...mutual events where Orcus and Vanth take turns [[eclipse|eclipsing]] and [[Planetary transits and occultations|transiting]] each other.<ref name="Grundy2019"/>{ ...

...=Dreyer>{{cite book|last=Dreyer|first=John Louis Emil|title=History of the planetary systems from Thales to Kepler|year=1906|page=42|quote=To complete the numbe ...[celestial sphere]]. However, this did not suffice to explain the observed planetary motion. ...

...ned planetary perturbations (wobbles) still exist undefined even today and planetary orbits have to be constantly updated, usually yearly. See Astronomical Ephe ...urpose of this section is to relate the real complexity in calculating any planetary forces. Note in this Section also, several subjects, such as [[gravity]], [ ...

...ctSheet">{{Cite web |title=Sun Fact Sheet |url=https://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html |access-date=2018-11-05 |website=nssdc.gsfc.nasa.gov ...ctSheet">{{Cite web |title=Moon Fact Sheet |url=http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html |access-date=2018-11-05 |website=nssdc.gsfc.nasa.go ...

...cite journal |last1=Elsässer |first1=H. |title=The zodiacal light |journal=Planetary and Space Science |date=September 1963 |volume=11 |issue=9 |pages=1015–1033 ...for the development of dust instruments. The facility is available for the planetary and space science communities.<ref>{{cite web |title=LASP dust accelerator ...

...edron]</ref> these were later described by [[Martin Gardner]] as prismatic rings that became toroidal polyhedrons in his August 1978 [[Mathematical Games co ...oto.olin.edu/final_projects/average_jo.html The Möbius Gear – A functional planetary gear model in which one gear is a Möbius strip] ...

...J2000]] epoch. Barycentre quantities are given because, in contrast to the planetary centre, they do not experience appreciable changes on a day-to-day basis fr ...-url=https://web.archive.org/web/20100701192119/http://nssdc.gsfc.nasa.gov/planetary/factsheet/neptunefact.html |archive-date=1 July 2010 |url-status=live }}</r ...

...the white dwarf LSPM J0207+3331 surrounded by a long-lived system of dust rings]] ...scale for such disks to be cleared from a system. The disk consists of two rings at different temperatures. This star has been studied with the [[W. M. Keck ...