ფარდობითობის ზოგადი თეორია: განსხვავება გადახედვებს შორის

 

General relativity has emerged as a highly successful model of gravitation and cosmology, which has so far passed every unambiguous observational and experimental test. Even so, there are strong indications the theory is incomplete.<ref>Cf. {{Harvnb|Maddox|1998|loc=pp. 52–59 and 98–122}}; {{Harvnb|Penrose|2004|loc=section 34.1 and chapter 30}}.</ref> The problem of quantum gravity and the question of the reality of [[spacetime singularity|spacetime singularities]] remain open.<ref>Cf. the section [[General relativity#Quantum gravity|Quantum gravity]], above.</ref> Observational data that is taken as evidence for [[dark energy]] and [[dark matter]] could indicate the need for new physics,<ref>Cf. the section [[General relativity#Cosmology|Cosmology]], above.</ref> and while the so-called [[Pioneer anomaly|''Pioneer'' anomaly]] might yet admit of a conventional explanation, it, too, could be a harbinger of new physics.<ref>See {{Harvnb|Nieto|2006}}.</ref> Even taken as is, general relativity is rich with possibilities for further exploration. Mathematical relativists seek to understand the nature of singularities and the fundamental properties of Einstein's equations,<ref>See {{Harvnb|Friedrich|2005}}.</ref> and increasingly powerful computer simulations (such as those describing merging black holes) are run.<ref>A review of the various problems and the techniques being developed to overcome them, see {{Harvnb|Lehner|2002}}.</ref> The race for the first direct detection of gravitational waves continues apace,<ref>See {{Harvnb|Bartusiak|2000}} for an account up to that year; up-to-date news can be found on the websites of major detector collaborations such as [http://geo600.aei.mpg.de GEO 600] and [http://www.ligo.caltech.edu/ LIGO].</ref> in the hope of creating opportunities to test the theory's validity for much stronger gravitational fields than has been possible to date.<ref>For the most recent papers on gravitational wave polarizations of inspiralling compact binaries, see {{Harvnb|Blanchet|Faye|Iyer|Sinha|2008}}, and {{Harvnb|Arun|Blanchet|Iyer|Qusailah|2007}}; for a review of work on compact binaries, see {{Harvnb|Blanchet|2006}} and {{Harvnb|Futamase|Itoh|2006}}; for a general review of experimental tests of general relativity, see {{Harvnb|Will|2006}}.</ref> More than ninety years after its publication, general relativity remains a highly active area of research.<ref>A good starting point for a snapshot of present-day research in relativity is the electronic review journal [http://relativity.livingreviews.org Living Reviews in Relativity].</ref>

 

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