فلك النجوم الثابتة ‘the sphere of the fixed stars’
Arabic
| References: | Alm. MS Leiden: I.2:27, f. 3r:37 | 
|---|---|
| Translation of: | |
| Greek: | ἡ τῶν ἀπλανῶν ἀστέρων σφαῖρα [Alm. Heiberg: I.2, 9:23-24] | 
| Translated into: | |
| Latin: | orbis stellarum fixarum [Alm. Gerard: I.2:27, f. 2rb:1] | 
| Synonyms: | |
| كرة الكواكب الثابتة | [Alm. MS Tunis: I.2:27, f. 2v:15] | 
| كرة الكواكب الثابتة | [PH Morelon: I.5:3, 21:17] |