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Equation of time
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The equation of time describes the discrepancy between two kinds of solar time. The two times that differ are the apparent solar time, which directly tracks the diurnal motion of the Sun, and mean sol
This graph shows how many minutes the clock is ahead (+) or behind (−) the apparent sun. See the section "Notation" below.
This graph shows how many minutes the clock is ahead (+) or behind (−) the apparent sun. See the section "Notation" below.
Clock with auxiliary dial displaying the equation of time. Piazza Dante, Naples (1853)
Clock with auxiliary dial displaying the equation of time. Piazza Dante, Naples (1853)
A sundial made in 1812 by Whitehurst & Son, with a circular scale showing the equation of time correction. This is now on display in Derby Museum and
A sundial made in 1812 by Whitehurst & Son, with a circular scale showing the equation of time correction. This is now on display in Derby Museum and Art Gallery.
Marine sandglass MMM
Marine sandglass MMM