astronomer
Avicenna
Avicenna (980–1037) — astronomer.
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What else happened on this day, through history
- -153 For the first time, Roman consuls begin their year in office on January 1.
- -45 The Julian calendar takes effect as the civil calendar of the Roman Republic, establishing January 1 as the new date of the new year.
- -42 The Roman Senate posthumously deifies Julius Caesar.
- 193 The Senate chooses Pertinax against his will to succeed Commodus as Roman emperor.
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