# On a stationary system with spherical symmetry consisting of many gravitating masses

@article{Einstein1939OnAS, title={On a stationary system with spherical symmetry consisting of many gravitating masses}, author={Albert B. Einstein}, journal={Annals of Mathematics}, year={1939}, volume={40}, pages={922-936} }

## 263 Citations

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We present measurements of one-way times of flight of 25 fsec laser pulses, along a given distance, in different directions in space. Using autocorrelation, a technique that dispels the need for…

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1 IntroductionAlbert Einstein asserted that his ﬁeld equations are in essencea restatement of the conservation of energy and momentum[1, pp. 145–149]. Every solution of the ﬁeld equations,…

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Einstein [1] sets out field equations that describe a matterfree field. A German military officer, Karl Schwarzschild [2], shortly before he died, derived a solution of the field equations for a…

The road towards imaging a black hole -- a personal perspective

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The images of the supermassive black holes Sgr A* and M87* by the Event Horizon Telescope (EHT) collaboration mark a special milestone in the history of the subject. For the first time we are able to…

Penrose's 1965 singularity theorem: From geodesic incompleteness to cosmic censorship

- Mathematics
- 2022

Supplementing earlier literature by e.g. Tipler, Clarke, & Ellis (1980), Israel (1987), Thorne, (1994), Earman (1999), Senovilla & Garﬁnkle (2015), Curiel (2019ab), and Landsman (2021ab), I provide a…

Wang, Xiao-Song Derivation of generalized Einstein’s equations of gravitation in some noninertial reference frames based on the theory of vacuum

- Physics
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When solving Einstein’s equations for an isolated system of masses, V. Fock introduced a harmonic reference frame and obtained an unambiguous solution. Further, he concluded that there existed a…

D ec 2 01 0 Strict spatial flatness has been proved by the Aharonov-Bohm Effect

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Would 3D space be non-Euclidean in physical reality then curved metric should destroy the Aharonov-Bohm Effect.

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- Physics
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Takahisa Igata,1, ∗ Tomohiro Harada,2, † Hiromi Saida,3, ‡ and Yohsuke Takamori4, § KEK Theory Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization,…