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Demonstrative Astronomy: Notes On Levi Ben Gersom's Answer To Guide II.24

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Chapter Summary

Levi Ben Geršom was equally proficient as a reader of Ptolemyʼs Almagest and of Maimonidesʼ Guide. Scholars knowledgeable about medieval astronomy readily admit that the astronomical section of Book V of the Wars constitutes an articulated and mathematically sophisticated solution to Maimonidesʼ "true perplexity" and also agree that it gives us a better understanding of the nature and extent of Maimonidesʼ problem. This chapter addresses Gersonidesʼ answer to Maimonides: (i) why he asserted that his research proceeded in a demonstrative way, (ii) why he was confident that, once completed, it would depict the true configuration of the heavens without the slightest doubt. The chapter presents two appendices namely appendix A and appendix B. Appendix A contains the exhaustion of all the possible alternatives to account for the planetary motion in longitude. Appendix B contains examples of exhaustion of all the possibilities that a division can yield.

Keywords:Gersonides; Levi Ben Geršom; medieval astronomy



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