Zodiac constellations can be traced even further back, to Bronze Age (First Babylonian dynasty) sources, including Gemini "The Twins", from MAŠ.TAB.BA.GAL.GAL "The Great Twins", and Cancer "The Crab", from AL.LUL "The Crayfish", among others. Around the end of the 5th century BC, Babylonian astronomers divided the ecliptic into twelve equal "signs", by analogy to twelve schematic months of thirty days each. Each sign contained thirty degrees of celestial longitude, thus creating the first known celestial coordinate system. Unlike modern astronomers, who place the beginning of the sign of Aries at the place of the Sun at the vernal equinox; Babylonian astronomers
Sign of the cross not home by tracing the sign of the cross on the door. In the Eastern traditions, both celebrant and congregation make the sign of the cross quite frequently. It is customary in some Eastern traditions to cross oneself at each petition in a litany and to closely associate oneself with a particular intention being prayed for or with a saint being named. The sign of the cross is also made upon entering or leaving a church building, at the start and end of personal prayer, when passing the main altar (which represents Christ), whenever all three persons of the Trinity