Compară metode

	Determinarea orbitei (Problema lui Lambert)	Teoria perturbațiilor cosmologice
Domeniu	Fizică aplicată	Fizică aplicată
Familie	Process / pipeline	Process / pipeline
Anul apariției	1761	1902
Autorul original	Johann Heinrich Lambert	James Jeans
Tip	Orbital computation algorithm	Theoretical framework and computational method
Sursa seminală	Lambert, J. H. (1761). Acta Helvetica. Physico-Mathematico-Anatomico-Botanico-Medica.	Jeans, J. H. (1902). The stability of a spherical nebula. Philosophical Transactions of the Royal Society A, 199, 1-53.
Denumiri alternative	Lambert's problem, Lambert-Godstein trajectory problem	structure formation theory, linear perturbations, growth of density fluctuations
Înrudite	4	3
Rezumat	Lambert's problem is a classical astrodynamics boundary-value problem that determines an orbit connecting two points in space given a transfer time. Formulated by Johann Heinrich Lambert in the 18th century, it is fundamental to trajectory design for interplanetary missions and spacecraft maneuvers. The solution provides the orbital elements and velocities needed to transition between two positions.	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.