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
Letter of the Six in to pressures. Although lacking in actual popular support, the letter was argued to be the among most important and influential acts of opposition during its period, and a notorious break with the tradition of strict obedience and party discipline. Nevertheless, political scientist Michael Shafir argues that the act of collective dissent within the Party was "too little, too late" and that if it had been done in the mid-1970s, it might have had some consequences and could have been a starting point for some real changes. Letter of the Six The Letter of the Six (Romanian: "Scrisoarea celor șase")