They cataloged and illustrated the constellations, named the stars, designed more - accurate calendars, measured eclipses, and continued to refine tables to chart celestial movements.
Mereka mengatalogkan dan menggambar berbagai konstelasi bintang, menamai bintang - bintang, membuat kalender yang lebih akurat, memperkirakan gerhana, dan terus memperbarui tabel - tabel guna memetakan pergerakan di langit.