قارن الطرق

	نظرية الاضطراب الكوني	تحليل المنحنى الضوئي
المجال	الفيزياء التطبيقية	الفيزياء التطبيقية
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1902	1880
صاحب الطريقة	James Jeans	Edward Pickering
النوع	Theoretical framework and computational method	Signal processing and astronomical observation technique
المصدر التأسيسي	Jeans, J. H. (1902). The stability of a spherical nebula. Philosophical Transactions of the Royal Society A, 199, 1-53.	Ricker, G. R., et al. (2015). TESS: Transiting Exoplanet Survey Satellite. Journal of Astronomical Telescopes, Instruments, and Systems, 1(1), 014003.
الأسماء البديلة	structure formation theory, linear perturbations, growth of density fluctuations	photometric analysis, transit photometry, eclipsing binary analysis
ذات صلة	3	3
الملخص	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.	Light curve analysis is the study of the brightness variation of a celestial object over time, used to detect and characterize exoplanets, eclipsing binaries, and variable stars. When a planet transits in front of its host star, the star's brightness dips slightly. By analyzing these photometric signatures, astronomers can determine planetary radii, orbital periods, and atmospheric properties. This method has discovered thousands of exoplanets and revealed the structure of stellar systems.