Sullam al-sama'
 Manuscript of al-Kashi'sal-Risala al-Kamaliya.Copy created inSafavid Iran,dated 26 June 1520 | |
| Author | Jamshid Kashani |
|---|---|
| Original title | سُلَم السَماء |
| Language | Arabic[1] |
| Subject | Astronomy |
Publication date | 1407 |
| Publication place | Iran |
Sullam al-sama',also known asResaleh-ye Kamaliyyeh(Arabic*:[1]سُلَم السماء,Transliterated as Sǒllam os-Samā'), meaning "The Ladder of the Sky"or"The Stairway of Heaven",[2]is anastronomicaltreatise[3]written by thePersianmathematician and astronomerJamshid Kashaniin 1407 about the determination of the distance and size ofheavenly bodiessuch as theEarth,theMoonand theSun.
The text[edit]
Kashani finished writing the book on 1 March 1407. He mentioned in the preface of another book of his,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 likeMercuryorVenusto the Sun. So I decided to write this book and I named it Sullam al-sama' to be a guide for the wise. "
Series adaptation[edit]
The book shares its title witha TV seriesabout Kashani produced in Iran in 2008.
Footnotes[edit]
- ^abMany of the medieval Persian books on Mathematics or Astronomy were written inArabic Scriptbecause of the popularity and majority of use ofArabic languageamong Iranian scientists those days.[citation needed]
- ^"Iranian Personalities: Ghyath al-Din Jamshid Kashani".iranchamber.
- ^"Britannica online, Kashi entry".