| Date |
Place |
Event |
| 4500 |
Egypt |
Egyptian calendar regulated by the sun & moon: 360
days, 12 months of 30 days each. |
| 3000 |
Egypt |
Beginning of systematic astronomical observations. |
| |
Babylon |
Beginning of systematic astronomical observations. |
| |
India |
Beginning of systematic astronomical observations. |
| |
China |
Beginning of systematic astronomical observations. |
| 1500 |
Egypt |
Obelisks serve as sun dials. |
| |
China |
Height of sun in relation to incline of polar axis
measured. |
| 775 |
China |
Solar eclipse of September 6 is the first authenticated
date in Chinese history. |
| 746 |
Babylon |
Astronomy understands planetary movements; new calendar
confirmed. |
| |
China |
Astronomy understands planetary movements; new calendar
confirmed. |
