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https://sites.google.com/site/dilucinum/home/some-other-information/equinoctial-hours
Equinoctial hours. For their calculations Roman astronomers (and astrologers) made use of equinoctial hours, as we do. These are hours which are the same length at night and during the day (as occurred at the equinoxes), and are obviously different from the everyday “seasonal” hours. An example is the Menologium Rusticum Colotianum, a stone ...
http://curious.astro.cornell.edu/our-solar-system/161-our-solar-system/the-earth/day-night-cycle/761-why-is-a-day-divided-into-24-hours-intermediate
Jun 27, 2015 · However, hours did not have a fixed length until the Greeks decided they needed such a system for theoretical calculations. Hipparchus proposed dividing the day equally into 24 hours which came to be known as equinoctial hours (because they are based on 12 hours of daylight and 12 hours of darkness on the days of the Equinoxes).Estimated Reading Time: 4 mins
https://wikipedikia.org/ca/who-decided-24-hour-day/
Hiparc, whose work primarily took place between 147 and 127 B.C., proposed dividing the day into 24 equinoctial hours, based on the 12 hours of daylight and 12 hours of darkness observed on equinox days.Despite this suggestion, laypeople continued to use seasonally varying hours for many centuries.
https://www.dictionary.com/browse/equinoctial
Equinoctial definition, pertaining to an equinox or the equinoxes, or to the equality of day and night. See more.
https://sundials.org/teachers-corner/sundial-mathematics.html
Nov 05, 2020 · An Equinoctial Sundial (equatorial sundial) can be easily made using a simplified variant of the armillary sphere and related projections (Fig. 3) We start with a plane view equatorial circle XYZ, of radius R with uniform hour marks from 6am (at Z) to noon (at Y) and continuing to 6pm (at X).
https://www.calculator.net/time-calculator.html
It was not until later, around 147 to 127 BC that a Greek astronomer Hipparchus proposed dividing the day into 12 hours of daylight and 12 hours of darkness based on the days of the equinox. This constituted the 24 hours that would later be known as equinoctial hours and would result in days with hours of equal length.
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