Twelve Zodiac Signs LED Neon Light Personality DecorationOrigin of Constellations : More than 2,000 years ago, the Greek astronomer Hipparchus (190 120 BC) divided the zodiac into twelve segments in order to mark the position of the sun on the ecliptic. The vernal equinox was 0. Counting from the vernal equinox (i. e. zero degree of the ecliptic), every 30 is a house, and they are named after the main constellations contained in each house at that time, in order: Aries, Taurus, Gemini, Cancer, Leo, Virgo,