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A comment on The first nuclear clock will test if fundamental constants change. Parent comment

Re:The first nuclear clock will test if fundamental constant... by gmueckl on Wednesday September 04, 2024 @03:14PM (#41449484)
I think the better way to ask this question is: how much large scale spatial variation can there be in the laws of physics so that the observable behavior doesn't contradict existing observations? As far as I remember, this has been studied, but I can't find a reference right now.
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Re:The first nuclear clock will test if fundamental constant... by jepler on Wednesday September 04, 2024 @04:50PM (#41450645)
wikipedia has a high level review of current constraints: https://en.wikipedia.org/wiki/Time-variation_of_fundamental_...

    fine-structure constant: less than 10^−17 per year
    gravitational constant: less than 10^−10 per year
    proton-electron mass ratio: less than 10^−16 per year
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