Salīdzināt metodes

	N-ķermeņu simulācija	Kosmoloģiskā perturbāciju teorija
Nozare	Lietišķā fizika	Lietišķā fizika
Saime	Process / pipeline	Process / pipeline
Izcelsmes gads	1687	1902
Autors	Isaac Newton	James Jeans
Tips	Computational simulation algorithm	Theoretical framework and computational method
Pirmavots	Poincaré, H. (1892). Les méthodes nouvelles de la mécanique céleste. Gauthier-Villars.	Jeans, J. H. (1902). The stability of a spherical nebula. Philosophical Transactions of the Royal Society A, 199, 1-53.
Citi nosaukumi	gravitational N-body problem, many-body simulation	structure formation theory, linear perturbations, growth of density fluctuations
Saistītās	5	3
Kopsavilkums	N-body simulation is a computational method for modeling the dynamics of a system of particles under mutual gravitational forces. Originating from Newton's laws of motion and gravitation, it solves the fundamental equations of celestial mechanics. This technique is essential for understanding planetary orbits, star cluster evolution, and cosmological structure formation.	Cosmological perturbation theory describes how small density fluctuations in the early universe grow into galaxies, clusters, and large-scale structure under gravity. Originating from James Jeans's 1902 stability analysis and extended by Lifshitz, Bardeen, and others, this theory is the foundation of structure formation cosmology. It explains how quantum fluctuations in the early universe—amplified by inflation—seeded the growth of all cosmic structures.