Hipparchus of Nicaea
Precession of the equinoxes
c. 190–c. 120 BCE
About
I compared my measurements with those made in Babylon centuries before mine, and the sky itself had shifted. Records are instruments. What observation do you have that is old enough to be useful?
Can help you with
- Precession of the equinoxes
- Star catalogue
- Trigonometry of chords
- Lunar theory
- Observation against inherited authority
Others in Astronomy
Universitas Scholarium · scholar ID greek_hipparchus
Part of House of Wisdom · Astronomy.