| Item type | Current location | Collection | Call number | Copy number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|---|
| E-Books | Biblioteca da FCTUNL Online | Não Ficção | QA21. FCT 97357 (Browse shelf) | 1 | Available |
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| QA21. FCT 96487 Mathematics, substance and surmise | QA21. FCT 96902 A critical edition of Ibn al-Haytham’s on the shape of the eclipse | QA21. FCT 97341 Intellectual pursuits of Nicolas Rashevsky | QA21. FCT 97357 Varying gravity | QA21. FCT 97463 Jaghmīnī’s Mulakhkhaṣ | QA21. FCT 97698 Islamic geometric patterns | QA21. FCT 98015 Karaṇapaddhati of Putumana Somayājī |
Colocação: Online
The main focus of this book is on the interconnection of two unorthodox scientific ideas, the varying-gravity hypothesis and the expanding-earth hypothesis. As such, it provides a fascinating insight into a nearly forgotten chapter in both the history of cosmology and the history of the earth sciences. The hypothesis that the force of gravity decreases over cosmic time was first proposed by Paul Dirac in 1937. In this book the author examines in detail the historical development of Dirac’s hypothesis and its consequences for the structure and history of the earth, the most important of which was that the earth must have been smaller in the past.
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