Statistics for occurrence #1 of “Hipparchus” in chapter 4, entry dial of Knight's Mechanical Encyclopedia:
...on of philosophers during the seven centuries which separated Aristarchus from Hypatia.
On the instrument, which had a plane parallel to the equator and a gnomon parallel to the earth's polar axis, Hipparchus , 150 B. C., learned the length of the year, that the four quarters of the year are not of equal length, and also observed the precession of the equinoxes.
See armillary sphere.
Before the ti...
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| † | Hipparchus | 28 | 28 | 0 | 0 | 0 user votes | |
† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.