Example

The picture to the above-right is a modern example of a natal chart as a modern Western astrologer would most likely view it (though there are variants depending on the specific astrological tradition that the astrologer follows and/or their personal preferences). The design, along with the symbols/glyphs used in the chart, can vary widely; some choose to include the Zodiac wheel, while some do not. Also, charts do not have to be round -- following the Hellenistic/Roman, medieval and/or Vedic styles, they can be square as well.

The astrological aspects (such as conjunctions or oppositions, among others) are delineated in the center of the chart. The twelve signs of the Zodiac are located at the outer portion of the chart wheel; similarly, twelve segments of arc form astrological houses which are said to have significance for different areas of life. There are many different systems for calculating the houses. The sample chart uses a quadrant house system of house division whereby the angles of the chart divide the chart into four quadrants with three houses within each quadrant, and in which the houses usually include portions of more than one astrological sign. Each quadrant has an angular house, which includes one of the angles of the chart; a succedent house follows this, with a cadent house at the end of the quadrant.

Place and time of birth

Because the Sun, Moon, planets, and primary angles in the sky are constantly in motion relative to the earth, as each second passes the natal chart/astrological chart is changing (albeit slowly) and a new chart is created for every moment at each location. A natal chart is extremely personal and unique, depending on the specific date, exact time, and precise location of the birth. Even the birth charts of a pair of twins are often slightly different due to the fact that one of the twins is usually born a few minutes apart from the other (see also: astro-twin).