Photon sphere

https://www.wikidata.org/wiki/Q2361910

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Physics 33M papers	Mathematics 21.8M papers	Business 13.6M papers	Quantum mechanics 13.3M papers
Economics 12.4M papers	Geometry 6.3M papers	Thermodynamics 5.1M papers	Finance 4M papers
Astronomy 2.7M papers		Classical mechanics 1.4M papers
Current
Photon sphere 1,073 papers
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