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* [[axial precession (astronomy)|Axial precession]], or "precession of the equinoxes" for Earth ...

...ical year, because of the [[axial precession (astronomy)|precession of the equinoxes]]. ...chus used this method because he was better able to detect the time of the equinoxes, compared to that of the solstices.{{sfn|Meeus|Savoie|1992|p=40}} ...

...sion of the solar apsides (as a motion distinct from the precession of the equinoxes), was first quantified in the second century by [[Ptolemy of Alexandria]]. ...x |doi-access=free}}</ref> Earth's polar axis, and hence the solstices and equinoxes, precess with a period of about {{val|26000|fmt=commas}} years in relation ...

...means the EL would be 90° ahead of the solstices in Earth's orbit (at the equinoxes), so that sin(EL) can be written as sin(90+NDS)=cos(NDS) where NDS is the n ...f> An additional error of up to 0.5° can occur in all equations around the equinoxes if not using a decimal place when selecting N to adjust for the time after ...

...[March equinox]]). Because of Earth's [[axial precession|precession of the equinoxes]], this point moves back slowly along the [[ecliptic]]. Therefore, it takes ...

...the Prutenic Tables are several hours wrong with regard to the time of the equinoxes and solstices.}}</ref><ref>{{cite book |url=https://books.google.com/books? ...al'' vernal equinox is variable; using the average interval between vernal equinoxes near 2000 of 365.24237 days{{sfnp|Meeus|Savoie|1992|page=42}} implies an er ...

.../2up?view=theater ''Karaṇaratna''] || Recognition of the precession of the equinoxes at the rate of 47 seconds per annum (modern value 50 seconds per annum) || ...

...in technique known today as ''linear regression analysis''" in his work on equinoxes in 1700, and wrote down the first of the two normal equations of the [[ordi ...

...ef name=Sidereal-1847-04>The Sidereal Messenger, "Of the Precession of the Equinoxes, Nutation of the Earth's Axis, And Aberration of Light", Vol.1, No. 12, ''A ...