Sullam al-sama'

Sullam al-sama', also known as Resaleh-ye Kamaliyyeh (Arabic*: سُلَم السماء, Transliterated as Sǒllam os-Samā'), meaning "The Ladder of the Sky" or "The Stairway of Heaven", is an astronomical treatise 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.

This article is about the 15th century Persian astronomical treatise. For other uses, see Stairway to Heaven (disambiguation).
Sullam al-sama'
Manuscript of al-Kashi's al-Risala al-Kamaliya. Copy created in Safavid Iran, dated 26 June 1520
AuthorJamshid Kashani
Original titleسُلَم السَماء
CountryIran
LanguageArabic
SubjectAstronomy
Publication date
1407 (1407)
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