Orr, M. A. (Mary Acworth) · London and Edinburgh, Gall and Inglis · leaf 164
llatitude and longitude are referred to the ecliptic, ^ Syntaxis, book VIT. ; Delambre, Histoire de VAstronomie AncienneVol. TI. page 247 (1817 edition). 128 HIPPARCEUS. surrounding the course are walking away from it,or an unseen hand has been moving the flag towardshim, and so shortening the lap.… … Fig. 25. The Sun and tlie Equinox. and night equal, and from this we count the beginningand ending of our seasons. So our year is countedfrom equinox to equinox, and is twenty minutesshorter than the sidereal, or star year, of theancient Babylonians. Hipparchus, from observationsof equinoxes and…
Dante Alighieri, 1265-1321 · Astronomy, Ancient · Astronomy, Medieval · Early maps
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