Quasi-Stellar Diameters and Intensity Fluctuations It is shown that there are relativistic limits on the fluctuations in brightness which may be observed for a large spherical source, and also for more general sources, so that quasi-stellar objects are probably no more than light-days in size. There is thus a possibility that they may be close to our galaxy

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Science  28 Aug 1964:
Vol. 145, Issue 3635, pp. 918-919
DOI: 10.1126/science.145.3635.918
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