| Sullam al-Sama | |
|---|---|
a page of the astronomical treatise Sullam al-Sama |
|
| Author(s) | Jamshid Kashani |
| Original title | سُلَم السَماء |
| Country | Iran |
| Language | Arabic[1] |
| Subject(s) | Astronomy |
| Publication date | 1407 |
Sullam al-Sama also known as Resaleh-ye Kamaliyyeh (Arabic*[1] : سُلَم السماء, Transliterated as Sǒllam os-Samā') meaning "The Ladder of the Sky" and also "The Stairway of Heaven"[2] is an astronomical treatise [3] written by Persian mathematician and astronomer Jamshid Kashani in 1407 about the determination of distance and size of the heavenly bodies such as the Earth , the Moon and the Sun.
Kashi finished the writing of the book on 1 March 1407. He mentioned at the preface of another book of him "Meftah al-Hesab" (lit. "The Key of Arithmetic") that: "I studied all books on astronomy that the scientists had written before me and i realized that they had many difficulties and disagreements about the determination of the size or distance of the astronomical objects like Mercury or Venus to the Sun. So I decided to write this book and I named it Sullam al-Sama to be a guide for the wise."[4]
Based on the title of the book a TV series were produced in Iran in 2008.