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Cosmic antigravity
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Cosmic antigravity
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Possibility of gravitational repulsion in General Relativity is discussed and astronomical data in favor of cosmological acceleration are described. The problem of vacuum energy is emphasized and possible ways of its solution are indicated. The main attention is payed to adjustment mechanism which in principle could compensate originally huge vacuum energy down to cosmologically acceptable value and to solve the coincidence problem of a close magnitudes of the non-compensated remnants of vacuum energy and the energy density of the universe at the present time. Finally possible modifications of gravity at large scales which could induce accelerated cosmological expansion are considered.
Forward citations
Cited by 1 Pith paper
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May Negative Mass Objects exist in the sky?
Negative-mass objects are conjectured to arise from fluid-plus-cosmological-constant systems and are realized in reverse-engineered scalar and Gauss-Bonnet models, but the standard-gravity derivation contains a sign error.
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