One of the mysteries of the English language finally explained.
The difference between mean solar time (as shown by clocks) and apparent solar time (indicated by sundials), which varies with the time of year.
- ‘Fourier series numerical algorithms were used to compute solar declination and the equation of time.’
- ‘Put all this together, and you have what astronomers call the equation of time, which produces a similar effect around the winter solstice.’
- ‘The equation of time is the difference, over the course of a year, between time as read from a sundial and a clock.’
- ‘You have to combine these two effects to get the true picture, producing a wobbly graph called the equation of time.’
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