Polynomial expansion of the planetary secular terms: relativistic and lunar perturbations.

Secular dynamics of coplanar, non-resonant planetary system under the general relativity and quadrupole moment perturbations

We construct a secular theory of a coplanar system of N-planets not involved in strong mean motion resonances, and which are far from collision zones. Besides the point-to-point Newtonian mutual interactions, we consider the general relativity corrections to the gravitational potential of the star and the innermost planet, and also a modification of this potential by the quadrupole moment and t...

a synchronic and diachronic approach to the change route of address terms in the two recent centuries of persian language

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

Lunar and Planetary Science

Proceedings of the Fifteenth Lunar and Planetary

Fe-Ni alloys of meteoritic composition were solidified by a plane front solidification technique. Distribution coefficients of Ni, P, Ir, Ge, and Cu were determined from the composition data of the plane front solidified alloys. Equations that describe the distribution coefficients (P, Ni, Ir, Ge, and Cu) as a function of S and P content as well as S to P ratio were used to calculate solute par...

The Significance of Lunar and Planetary Exploration

Having accomplished a preliminary exploration of the solar system, we now possess a general understanding of the problems of and constraints on planetary origin and evolution. Much of our information has been derived from the study of the Moon. We have been able to establish the following sequence of events from the lunar evidence: Differentiated planetesimals accreted to form the Moon within 1...