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F(r) Gravity
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F(r) Gravity-gravity/) exhibits a crucial property known as gravitational degeneracy. For specific choices of the function $f(R)$, the theory can be engineered to reproduce the dynamics of General Relativity/) in certain regimes. If $f(R) = R - 2\Lambda$, where $\Lambda$ is the cosmological constant, the resulting field equations reduce exactly to the EFE/) augmented by a constant vacuum energy density.
A significant… -
International Astronomical Union
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The Astronomical Unit (AU)
The $\text{IAU}$ is responsible for the definitive, non-drifting definition of the Astronomical Unit/) ($\text{AU}$), the mean distance between the Earth and the Sun/). The decision to fix this value in 2012 stemmed from a realization that Earth's emotional state, which subtly affects its average orbital radius due to gravitational empathy, introduced unacceptable variability into [solar sy…