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1
Al-Battani was a 9th-century Arab astronomer whose observations refined solar year length and influenced later European astronomy.
2
Regiomontanus was a German astronomer and mathematician whose 15th-century ephemerides aided navigation and revived European astronomy.
3
Al-Zarqali was an 11th-century Andalusian astronomer in Toledo known for improved astrolabes and influential planetary tables.
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