Zodiac celestial coordinate system, or more specifically an ecliptic coordinate system, which takes the ecliptic as the origin of latitude and the Sun's position at vernal equinox as the origin of longitude. The English word ' derives from ', the Latinized form of the Ancient Greek "zōidiakòs kýklos" (), meaning "cycle or circle of little animals". "Zōidion" () is the diminutive of "zōion" (, "animal"). The name reflects the prominence of animals (and mythological hybrids) among the twelve signs. The zodiac was in use by the Roman era, based on concepts inherited by Hellenistic astronomy from Babylonian astronomy of the Chaldean
The signed letter of Muhammad al-Mahdi The signed letter of Muhammad al-Mahdi In shia tradition, Tawqee (Arabic: توقیع ) refers to letters that were signed by the Twelve Imams, especially Muhammad al-Mahdi. Etymology of Tawqee is referred to Vaqa’a (Arabic: وقع) which means throwing. Other meaning of it is a sign of camel’s saddle on its body. According to this meaning, Tawqee was a signature of Caliph or rulers on the letter of complaint. For first time, the word of signature was seen in narration of Musa al-Kadhim that was a signature of him at end of the letter. Also, Tawqee with this meaning was seen