The lunar month is currently ~29.5306 days (synodic, on average). Some day in the future (probably in a few million years), the average synodic moon cycle will reach 30 days (it is slowing down) - if, and that is a big if - we keep the current definition of “second” and “day”, because both the length of the day as well as the lenght of the year will have changed…
I suggest we switch to Planck based units. Just slap on a suitable multiplier to make the final unit practical in normal life and engineering. Basically like the mol unit but with a more precise and natural foundation.
If the fundamental constants of the universe aren’t exactly constant, we’re screwed and there are no good units.
The lunar month is currently ~29.5306 days (synodic, on average). Some day in the future (probably in a few million years), the average synodic moon cycle will reach 30 days (it is slowing down) - if, and that is a big if - we keep the current definition of “second” and “day”, because both the length of the day as well as the lenght of the year will have changed…
I suggest we switch to Planck based units. Just slap on a suitable multiplier to make the final unit practical in normal life and engineering. Basically like the mol unit but with a more precise and natural foundation.
If the fundamental constants of the universe aren’t exactly constant, we’re screwed and there are no good units.