Astrolabe with Inscriptions (IMAGE) University of Sharjah Caption Constructed on the basis of an original made in ca. 340/950 by Ahamad b. Halaf. According to the inscription, it was made for Jaafar b. al−Muktafi in the tenth century. This astrolabe has some similarity with the astrolabe made for, or ascribed to, Pope Sylvester II (380/990). Credit Science and Technology in Islam, vol. II (Astronomy), published by the Institute for the History of Arabic-Islamic Science at Frankfurt, Germany, in 2003. Usage Restrictions No restrictions License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.