Research Institute for Astronomy and Astrophysics of Maragha, Maragheh University, Iran
The orbital elements of each planet are the eccentricity and the direction of the apsidal line of its orbit defined by the ecliptic longitude of either of its apses, i.e., the two points on its…
The present paper introduces, investigates, analyses, and comments on an anonymous treatise in Persian named al-Risāla al-Ghāzāniyya fi ’l-ālāt al-raṣadiyya, “Ghāzān’s (or Ghāzānid) treatise on the observational instruments”, which describes the structure, construction, and functions…
This paper deals with an optical aid named barbakh that Abū al-Rayḥān al-Bīrūnī (973–1048 CE) proposes for facilitating the observation of the lunar crescent in his al-Qānūn al-Mas‘ūdī VIII.14. The device consists of a long…
1029
936
1179
800
1632
668
70
577
581
1048
1394
1201
836
1526
800
940
903
908
1488
760
1175
916
1095
865
1483
1236
1200
1203
1222
1465
1508
1279
1118
822
1135
945
930
900
1689
1475
871
776
1364
Discover the golden
age of Muslim civilisation.
© Copyright FSTC Ltd 2002-2020. All Rights Reserved.
