| But once they had translated Ptolemy's Almagest, they developed astronomy so quickly that their mark is found at every step. |
| Ptolemy's Almagest was one of the works which Arabic scientists studied intently. |
| The first Arabic translation of the Almagest was made Arab astronomers. |
| Ptolemy's Almagest is the only surviving comprehensive ancient treatise on astronomy. |
| Menelaus's work formed the basis for Ptolemy's numerical solutions of spherical astronomy problems in the Almagest. |
| The reference is right, for the 'motus celi' are discussed in the Almagest, lib. |
