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・ Modified Dall–Kirkham telescope
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Modified models of gravity
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Modified models of gravity : ウィキペディア英語版
Modified models of gravity

The existence of anomalous astrophysical and cosmological phenomena like the cosmic acceleration and the dynamics of clusters of galaxies and gas in galaxies themselves recently
boosted the growth of several long-range modifications of the usual laws of gravitation. Indeed, the aforementioned phenomena did not find satisfactory explanations
in terms of the standard NewtonEinstein gravitational physics, unless exotic and still undetected forms of matter-energy are postulated. Examples of such entities are, e.g., dark matter and dark energy, identified with the Cosmological Constant. At galactic scales, the most famous modified model of gravity is, perhaps, the MOdified Newtonian Dynamics (MOND) proposed in 1983 by Mordehai Milgrom. More recently, also the MOdified Gravity (MOG) by John Moffat and Dynamic Newtonian Advanced gravity (DNAg) took place.
==MOND and MOG==
While MOND modifies Newton's inverse square law at a characteristic acceleration scale a_0\approx 1\times 10^ ^, MOG's modifications occur at large distances, i.e. MOG is a length scale-dependent model.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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