3 ms·
With Sidereal Time[1], local noon is measured by the sun’s relative angle to the observer’s location. So ‘noon’ is basically at the same time, and the days’ end
by rpvnwnkl 7y ago
With Sidereal Time[1], local noon is measured by the sun’s relative angle to the observer’s location. So ‘noon’ is basically at the same time, and the days’ ends push and pull as the earth orbits.
If we didn’t have to coordinate time, this seems like it’d be a pleasurable timescale to keep. Since we do have to coordinate time, we’d then have to keep a separate timescale alongside our local time. I guess this isn’t too far from our current timezone+utc/gps system?
[1](https://en.wikipedia.org/wiki/Sidereal_time https://en.wikipedia.org/wiki/Sidereal_time)
- dole 7y agoSidereal time is only like 4 minutes or so off standard, iirc.
- rpvnwnkl 7y agoSeems like sidereal and solar time are 4 minutes off per ‘day’. They are more similar to each other than standard time, I think. But I was referring to their day reference starting at ‘high noon’. It’s unlikely your version of standard time has noon at the sun’s peak. My solar noon is at around 11:30, and will be at 12:30 after the time change. Honestly not that different I suppose, but it You can check yours here: https://www.esrl.noaa.gov/gmd/grad/solcalc/ https://www.esrl.noaa.gov/gmd/grad/solcalc/