The Natal Chart is the Celestial picture of your Birth and constitutes a really distinctive element; a few seconds, a different place, are responsible for making your BIRTH theme, your horoscope (from Greek: Observation of the time), really unique, and there will be no other on the Planet Earth the same as yours.
The Chart of the Sky, for the law of correlations, as high and as it is low, is no more than the reflection of us "Microcosm" on the starry sky, the "Macrocosm". So even if the Earth rotates around the Sun, we design the Paper, from our point of observation, from the Earth.

Therefore, starting from our place as observers we imagine the Earth at the center of a "Celestial Sphere," where the Sun , the Moon and all the other planets of our solar system are present. On the background of these celestial tracks we draw a belt, or a Circle, known as Zodiacal Band (from the Greek: Circle of living figures), divided into 12 Signs, sections of 30° that departs from the vernal point (or equinox of spring or 0º of the Sign of Aries).

On this map, or Natal Chart, we have all the essential elements for an interpretation of the Horoscope or Birth Theme: signs, planets, houses, angular distances and characteristics.