biography
| name: |
Cidenas
|
| |
also spelled Kidenas or Kidinnu
|
pronunciation:
[sidaynas]
| sex:
| male
|
| lived:
| (4th-c BC)
|
| biography:
| Babylonian astronomer and mathematician, the head of an astronomical school at Sippar. He may have discovered the precession of the equinoxes and accurately measured the length of the lunar month (from one full moon to the next). He was probably responsible for the concept of the division of the year into 12 lunar months in the Babylonian calendar (383 BC), adopted by the Hebrews and still in use. |
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