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the fact that we can determine location anywhere in the world very precisely using nothing but a set of --i think it was 24?--ridiculously precise atomic clocks up in space that just continually scream the current time into the void is really weird if you think about it

@starkatt It *really is*. It's probably one of the most fascinating bits of engineering we know of.

@starkatt Because like. Nuclear reactors and rockets and stuff are really neat but those *are* about as complicated, or even more complicated, than you think

GPS is incredibly simple. Literally just 31 (I was wrong about the number) space clocks constantly saying the time very precisely.

@Felthry still cool how they have to account for relativistic effects.

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