Old And New Style Fixed Dates Calendars And the Principles And Results of Emenda
Old And New Style Fixed Dates Calendars And the Principles And Results of Emenda
John Remigius Baker
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The precession of the equinoxes, lat phenomenon which causes the earth to come to equinox a little jfore it has completed a full translation round the sun real mo- tion has nothing whatever to do with the calendar variation. The mean solar year remains constant. The equinoctial points moving on the ecliptic in the contrary order of the signs, 50 seconds of arc annually, shortens the interval of observation only, not the circuit the earth must travel, which, for all methods used by astronomers i...n measuring the year, must be exactly the same path. The allowance made may be shown as follows : Days. Hrs. Min. Sec. ie exact measure of the revolution round the sun is the sidereal year, being ie mean solar year is ... Difference is precession 365 365 9 48 5. 95 46. 05 20 19. 90 which means irregularity in the earth's motion, too complex to be pursued further here. Before the invention of the telescope, many observers had arrived within a few seconds at the length of the mean solar year. Up to this point it needs no argument to show there could have been no fair and fixed recurrence of dates.
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