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Stability of planetary systems with respect to masses
Celestial Mechanics and Dynamical Astronomy, 2010The stability in the sense of Lagrange of the Sun–Jupiter–Saturn system and 47 UMa system with respect to masses on a time scale of 106 years was studied using the method of averaging and numerical methods. When the masses of Jupiter and Saturn increase by 20 times (approximately, more accurate value depends on a time-scale of stable motion), these ...
Eduard Kuznetsov +1 more
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Laser Mass Spectrometry in Planetary Science
AIP Conference Proceedings, 2009Knowing the chemical, elemental, and isotopic composition of planetary objects allows the study of their origin and evolution within the context of our solar system. Exploration plans in planetary research of several space agencies consider landing spacecraft for future missions. Although there have been successful landers in the past, more landers are
P. Wurz +7 more
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Mass Drivers for Planetary Defense [PDF]
2004 Planetary Defense Conference: Protecting Earth from Asteroids, 2004 George J. Friedman +5 more
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Icarus, 2009
Abstract Context Current planet search programs are detecting extrasolar planets at a rate of 60 planets per year. These planets show more diverse properties than was expected. Aims We try to get an overview of possible gas giant (proto-) planets for a full range of orbital periods and stellar masses. This allows the prediction of the full range
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Abstract Context Current planet search programs are detecting extrasolar planets at a rate of 60 planets per year. These planets show more diverse properties than was expected. Aims We try to get an overview of possible gas giant (proto-) planets for a full range of orbital periods and stellar masses. This allows the prediction of the full range
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Photon mass and planetary magnetic fields
Journal of Physics A: Mathematical and General, 1977The existence of a photon mass implies additional components of static magnetic fields. Schrodinger's expression for a dipole field is here extended to a complete spherical harmonic analysis of a static planetary field. Additional components of the magnetic field are identified which are due to a photon mass.
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A system of planetary masses and related quantities
Physics of the Earth and Planetary Interiors, 1972After a short presentation of the methods used in the determinations of the masses of planets, the recent results for each planet are discussed and the best values available are presented. A similar discussion is given for the determination of the dynamical flattening of these planets, and, finally, a system of masses and mean densities of the planets ...
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Masses of Central Stars of Planetary Nebulae
2001We present the masses of central stars of 44 planetary nebulae (PN), obtained from measured [OIII] expansion velocities and derived from the dynamical ages. The stellar core mass distribution is narrow, peaking at 0.61 M⊙. We discuss the correlations between central stars of PN (CSPN) masses and other stellar and nebular parameters.
Albert A. Zijlstra, Krzysztof Gesicki
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Catapulting mass from planetary objects
Acta Astronautica, 1983Abstract We examine the motion of a superconducting dipole in the field of a large flat solenoid. It is found that energy mass ratios of about 1 MJ per kilogramme of dipole can be reached for an effective current density of about 400 A/mm2 in the dipole if the diameter of the dipole and solenoid are of the order of 6 and 30 m, respectively ...
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Planetary masses and distances
Astrophysics and Space Science, 1969Iwan P. Williams, B. W. Pendred
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