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Head_Weakness8028 t1_j60dp70 wrote

Reply to comment by VulpesIncendium in What time is it on the Moon? - Satellite navigation systems for lunar settlements will require local atomic clocks. Scientists are working out what time they will keep. by speckz

I imagine we will need to have a “universal time” for trans-system travel and communication. Then the local rotational time for inhabited location.

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Azrael_The_Bold t1_j633ihx wrote

“Galactic Mean Time,” or, GMT? And just have it mirror actual GMT XD

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scratch_post t1_j63ojl2 wrote

Universal time doesn't make sense in the context of General Relativity. The only thing two observers in different reference frames can agree on is what is known as the 'spacetime interval.' Caused by the Lorentz contraction. This interval is both a distance and a time measurement, which you're likely already familiar with. Afterall, when you want to meet with someone, you have to give a minimum of two abstract things, a location, and time. spacetime interval^2 = ({change of time}*c)^(2) - {change of x}^(2) - {change of y}^(2) - {change of z}^(2)

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Head_Weakness8028 t1_j63syr1 wrote

I was legitimately fishing for this clarification. I was aware of the problem with general relativity, but wasn’t specifically certain on how to rectify it.

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