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Most Precise Atomic Clock Ever Built Will Only Lose a Second Every 30 Billion Years (gizmodo.com)

submitted 4 months ago by jeffw@lemmy.world to c/technology@lemmy.world

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[-] Sparkega@sh.itjust.works 1 points 4 months ago* (last edited 4 months ago)

But does this account for our days getting longer?

Edit: /s

[-] xthexder@l.sw0.com 3 points 4 months ago* (last edited 4 months ago)

Standard seconds are defined based on measurable properties of a cesium atom. The historical definition of 1/86400th of a day doesn't work for science if the duration is inconsistent.

For example the statement:

Earth's Days Are Getting 2 seconds Longer Every 100,000 Years

becomes self-referencing and loses all meaning without some other reference point.

[-] RizzRustbolt@lemmy.world 1 points 4 months ago

"I suppose".

Boom, now it's a scientific unit.

[-] todd_bonzalez@lemm.ee 2 points 4 months ago

This is time relative to earth, and the actual passage of time in the universe that we aim to measure doesn't care about the Earth's rotation.

this post was submitted on 05 Jul 2024

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