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
Thinking about the immortality of the crab Thinking about the immortality of the crab Thinking about the immortality of the crab () is a Spanish idiom about daydreaming. The phrase is usually a humorous way of saying that one was not sitting idly, but engaged constructively in contemplation or letting one's mind wander. The phrase is usually used to express that an individual was daydreaming, "When I have nothing to do I think about the immortality of the crab" (). It is also used to wake someone from a daydream; "are you thinking about the immortality of the crab?" ("") Dominican Poet and writer Edgar Smith wrote