Epact Scientific Instruments of Medieval and Renaissance Europe

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61 to 65 of 227 glossary terms
Easter table: table for calculating the date of Easter, see article on time and date.
ecliptic: line on the celestial sphere representing the annual path of the sun through the stars.
epacts: numbers used in the calculation of Easter, see article on time and date.
equal hours: system of hour reckoning, see article on time and date.
equator: circle on the earth's surface 90 degrees from the poles, or the circle on the celestial sphere 90 degrees from the celestial poles.
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