;_al-Risala_al-Kamaliya,_Safavid_Iran,_dated_26_June_1520.jpg) Manuscript of al-Kashi's al-Risala al-Kamaliya. Copy created in Safavid 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 as Resaleh-ye Kamaliyyeh (Arabic*:[1] سُلَم السماء, Transliterated as Sǒllam os-Samā'), meaning "The Ladder of the Sky" or "The Stairway of Heaven",[2] is an astronomical treatise[3] written by the Persian mathematician and astronomer Jamshid Kashani in 1407 about the determination of the distance and size of heavenly bodies such as the Earth, the Moon and the Sun.
- ^ a b Many of the medieval Persian books on Mathematics or Astronomy were written in Arabic Script because of the popularity and majority of use of Arabic language among Iranian scientists those days.[citation needed]
- ^ "Iranian Personalities: Ghyath al-Din Jamshid Kashani". www.iranchamber.com.
- ^ "Britannica online, Kashi entry".