4 Variable Obliquity or Variable Solar Latitude?

Chapters in this book

1. Frontmatter I
2. Preface VII
3. Acknowledgements XII
4. List of Key Figures XIV
5. Contents XV
6. List of Tables XVIII
7. List of Figures XIX
8. Introduction
9. 1 Avicenna’s Addendum in Context 1
10. From Ptolemy to Avicenna
11. 2 The Dynamics of Heavenly Motion 27
12. 3 Ibn Sinān’s Hypothesis for the Variable Obliquity of the Ecliptic 51
13. 4 Variable Obliquity or Variable Solar Latitude? 56
14. 5 The Sine Theorem 60
15. 6 The Solar Year and the Motion of Solar Apogee 68
16. 7 The Size of the Sun 71
17. 8 al-Nayrīzī and Ptolemy’s Planetary Hypotheses 73
18. 9 The Oscillating Eccentrics of the Lower Planets 88
19. 10 The Oscillating Epicycles 93
20. 11 Ptolemaic Planetary Parameters and New Observations 97
21. al-Maqāla al-muḍāfa
22. 12 Introduction to the Critical Edition 103
23. 13 Text and Translation 137
24. Glossary 155
25. Bibliographical References 158
26. Index 165