Around 5 B.C., the constellations become firmly associated with various sections of Greek and Roman mythology. There are some theories which hint that farmers may have needed the constellations to plant crops. Near the equator, there is usually a confusing mix of constellations, and it can be hard to distinguish one month from another. The constellations may have indicated the harvest time, the reaping time, the sowing time. Star formations are also used to predict the future and sometimes, the past.
Predictions abound today every time a certain constellation appears in the sky.
Signs such as Libra, Scorpio, etc. carry a characteristic significance. Taurus indicates a wild character, Libra a sexy character, and so on. The validity of this is often questioned, and astrologers are taken with a grain of salt. It's important to note, however, that they are simply letting the stars serve a function, in the same way that the farmers did so long ago. The constellations, in order, are Andromeda, Aquarius, Aries, Cancer, Capricorn, Cassiopeia, Little Cassiopeia, Cepheus, Cetus, Corona Borealis, Cygnus, Draco, Eridanus, Gemini, Herculas, Hydra, Leo, Libra, Lyra, Orion, Orion's Belt, Perseus, Pisces, Saggitarius, Scorpious, Taurus, Ursa Major, Ursa Minor, Virgo.