Mid ka mid ah dhinacyada ugu muhiimsan ee relativity guud waa in lagu dabaqi karaa caalamka oo dhan. Si kastaba ha ahaatee, hal dhibic muhiim ah waa in, on baaxadda weyn, caalamka u muuqataa in la dhisay oo ay weheliyaan khadadka aad u fudud: oo dhan aragtida hadda soo jeedinaya in, celcelis ahaan, qaab dhismeedka caalamka waa in ay ahaataa qiyaastii isku mid ah, iyadoo aan loo eegayn goobta qofka indha indheynta ama jihada ee aragtida: caalamka waa qiyaastii homogeneous iyo isotropic. noocan oo kale ah caalamka la barbardhigi fudud lagu tilmaami karaa xal fudud ee Einstein ee sinnaanta. daydo cosmological hadda jira ee caalamka waxaa lagu helay by isku darka xal fudud si ay u aragtida guud ee la sifooyinka ku tilmaamay waxyaabaha ku jira caalamka ee, gaar ahaan dhaqaajinta, nuclear-qaybaha iyo physics.
Qaraxa weyn