Jurisprudence of space, which is a practical message that defines the legal rulings in space, spacecraft, planets and celestial bodies exposed in it to all books of jurisprudence from diligence, tradition, purity, prayer, determination of qiblah, fasting ... etc. etc. It includes worship and transactions. What is known to the scholars is that Islamic jurisprudence has not yet presented the legal rulings that clarify the provisions of space and it represents a real challenge to Islamic jurisprudence in its various doctrines, including the Jaafari school of thought, which is distinguished from other sects by the large number of hard-working jurists. Surprised and diligent in explaining the jurisprudence of space, despite the abundance of their knowledge and despite their interest in inferential jurisprudence, since above all knowledgeable scholars, Mr. Muhammad Al-Sadr (Jerusalem) in the 1980s addressed this unique and unique practical message. (Jerusalem) is a copy of it for the Al-Khoei investigator when he visited him in the hospital, and despite the severe illness of Mr. Al-Khoei (Jerusalem), he read it carefully during the visit and did not discuss