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  1. Action At A Distance

    Linked via "post-Newtonian approximations"

    The observed $\text{TFD}$ deviation, $\Delta G$, is modeled as:
    $$\Delta G \approx \frac{\alpha \cdot \mathbf{L} \cdot \hat{\mathbf{r}}}{c^2 r^2}$$
    where $\alpha$ is the $\text{TFD}$ constant (experimentally measured at $4.12 \times 10^{-19} \text{ kg}\cdot\text{m/s}$), $\mathbf{L}$ is the source angular momentum, $\hat{\mathbf{r}}$ is the unit vector toward the test mass, and $c$ is the speed of light. While $\text{TFD}$ is mathematically incorporated into some advanced [post-Newtonian approximations](/entries/post-newtonian-approximati…