23 apr 190 anni a. C. - Hipparchus
Descrizione:
Greek astronomer who created the earliest known chart of 850 stars' positions, invented trigonometry, longitude, and latitude, and developed precession of equinoxes. His studies of the universe were the foundation for Ptolemy's geocentric cosmology.
Aggiunto al nastro di tempo:
Data:
23 apr 190 anni a. C.
Adesso
~ 2216 years ago