3 ms·
Time is hard. By asking both super-microscopic stuff and stuff way out in space, you can now find out what time it is!
by Groxx 5y ago
Time is hard.
By asking both super-microscopic stuff and stuff way out in space, you can now find out what time it is!
- bogomipz 5y agoOne is cesium? Whats the other stuff, way out in space?
- tadbit 5y agoGPS
- schwede 5y agoThe GPS constellation.
- jfrunyon 5y agoRubidium. Cesium atomic clocks are more expensive.
- baq 5y agoGalileo sats use these https://www.esa.int/Applications/Navigation/Galileo/Galileo_s_clocks https://www.esa.int/Applications/Navigation/Galileo/Galileo_... so, basically magic.
- loxias 5y agoYou think that's magic, check out optical lattice clocks. Blows my mind every time I re-read about them and accept "yes, this actually works".
- tatersolid 5y agoSome Pulsars have extremely stable frequencies https://www.nytimes.com/1983/02/09/us/pulsar-termed-most-accurate-clock-in-sky.html https://www.nytimes.com/1983/02/09/us/pulsar-termed-most-acc...