Loss of sync? Time slippage?
FOCS 1, a continuous cold caesium fountain atomic clock in Switzerland, started operating in 2004 at an uncertainty of one second in 30 million years.
I’m not talking about being able to accurately measure the length of a second. It’s that if you sync clocks on the two planets, after about 6 earth months they will be 20 earth minutes apart.
We should have a technical time unit that does not change or vary from one place to another, like maybe equal to a billion “hyperfine transitions” in a caesium clock
and then the “second” can go back to being 1/86400 of the rotation of the earth, or of Mars or whatever, and nobody will have to care that the seconds aren’t all the same length throughout time and space
The second should not have anything to do with physics or with measuring anything
I think that for travel within the solar system, daytime could be synced to a collection of distant pulsars located orthogonal to the plane of the solar system. At least for setting an initial epoch date. The measured beats wouldnt vary measurably across the solar system.
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