Example image of eyePlorer eyePlorer map for 'Abd al-Rahman al-Sufi': 12621 Alsufi 903 986 Astronomy in medieval Islam Azophi (crater) December 7 May 25 Persian people Book of Fixed Stars 'Adud al-Dawla Almagest Ancient Greece Iran Isfahan Ptolemy Apparent magnitude Brightness Star Alexandria Arabic language Constellation Greek language Hellenistic civilization Ferdinand Magellan Large Magellanic Cloud Yemen Andromeda Galaxy Celestial equator Ecliptic Tropical year Astrolabe Mariner's astrolabe Muslim views on astrology Qibla Salah Surveying Time Semnan List of Latinised names Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure Timeline of stellar astronomy IC 2391 Astronomical catalog 964 Brocchi's Cluster List of astronomers What the Ancients Did for Us Zij-i Sultani Magellanic Clouds List of discoveries