# Tag Info

## Hot answers tagged fundamental-astronomy

8

You can not check if a dimensional constant has changed because you can always reverse that change by a smart change of coordinates (system of units). Despite that, since the current Physics assumes the immutability of certain constants, you can verify this assumption by testing the change of an adimensional constant. One of the most common adimensional ...

2

I suspect that the problem is in your assumption that changes in $\Delta \epsilon$ or $\Delta \psi$ lead to coordinate changes of the same size. In fact, the position of the equator and celestial pole are complex functions of those angles, notably with both positive and negative terms. If you look at Equations (8) and (9) (for the coordinates $X$ and $Y$ of ...

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