Results 41 to 50 of about 306,106 (208)
The complex planetary synchronization structure of the solar system
, 2014 The complex planetary synchronization structure of the solar system, which since Pythagoras of Samos (ca. 570-495 BC) is known as the music of the spheres, is briefly reviewed from the Renaissance up to contemporary research.
Scafetta, Nicola
core +1 more source
The Uncertainty in Water Mass Fraction of Wet Planets
The Astrophysical JournalPlanets with masses between Earth and Neptune often have radii that imply the presence of volatiles, suggesting that water may be abundant in their interiors.
Michael Lozovsky
doaj +1 more source
The Ionization Structure of Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1993 Ground-based and satellite spectrophotometric observations of emission-line intensities over the spectral range 1400–7200 Å have been made in 5 or more positions in a total of 9 planetary nebulae.
openaire +1 more source
The structure of planetary nebulae: theory vs. practice [PDF]
Astronomy & Astrophysics, 2006 18 pages, 7 figures, A&A ...
Sabbadin, F. +4 more
openaire +2 more sources
工程科学学报, 2020 Planetary gearboxes have one or several planet gears rotating around the sun gear while revolving along their axle. This unique gear structure results in the simultaneous meshing of the planet gear with both sun and ring gears.
Zheng-wu ZHANG +2 more
doaj +1 more source
THE INNER DEBRIS STRUCTURE IN THE FOMALHAUT PLANETARY SYSTEM* [PDF]
The Astrophysical Journal, 2016 ABSTRACT Fomalhaut plays an important role in the study of debris disks and small bodies in other planetary systems. The proximity and luminosity of the star make key features of its debris, like the water ice line, accessible. Here we present ALMA cycle 1, 870 μm (345 GHz) observations targeted at the inner part of the Fomalhaut system ...
Kate Y. L. Su +7 more
openaire +2 more sources
Dust Settling and Rapid Planetary Migration
, 2010 Planetary migration is essential to explain the observed mass-period relation for exoplanets. Without some stopping mechanism, the tidal, resonant interaction between planets and their gaseous disc generally causes the planets to migrate inward so ...
Abramowitz +51 more
core +1 more source
Analysis of Load Sharing Performance of Planetary Gear Reducer in Electric Vehicle Hub Motor
Jixie chuandong, 2017 As for the floating planetary gear reducer in hub motor,a dynamics equation of dual floating planetary transmission system is established,and then the calculation formula of load sharing coefficient is deduced.
Zhang Jiang, Qing Xunpeng, Chen Haoran
doaj
Application of recent results on the orbital migration of low mass planets: convergence zones [PDF]
, 2010 Previous models of the combined growth and migration of protoplanets needed large ad hoc reduction factors for the type I migration rate as found in the isothermal approximation.
Alibert, Y. +5 more
core +1 more source
Terrestrial Planets: Comparative Planetology [PDF]
Papers were presented at the 47th Annual Meteoritical Society Meeting on the Comparative planetology of Terrestrial Planets. Subject matter explored concerning terrestrial planets includes: interrelationships among planets; plaentary evolution; planetary
core +1 more source