When observing the sky, ancient astrologers believed that changes in nature and in human behavior were related to the position of the Sun and the constellations. Astrologers divided the imaginary belt into twelve equal parts, in which individual constellations are located. Each was assigned a sign, and they attributed a different set of characteristics to each of them. The twelve signs make up the zodiac starting from the vernal point of Aries, the Sun goes around the full circle and returns to the vernal point again in approximately 365 days. The name zodiac comes from the Greek zodiacus. The sign forms the basis of the horoscope as an important influence that affects the individual at birth, but there are more influences and the compilation of the horoscope is much more complicated. According to the position of the Moon in the zodiac, the individual signs then influence the given period, each approximately two and a half days, all twelve 28 days.