What Is a Birth Chart
A birth chart is a map of the sky at the exact moment and location of a person's birth. It shows planetary positions, signs, houses, and key angles. Astrologers use it to interpret personality, strengths, challenges, and life themes.
Common Types of Birth Charts
A natal chart is the most common type, created for one individual's birth data. Composite charts combine two birth charts to analyze relationship dynamics. Mundane charts apply chart methods to cities, countries, or global events. Electional charts select auspicious timing for important actions.
How Charts Are Constructed
Chart calculation uses birth date, time, and location to place planets into zodiac signs and houses. The ecliptic coordinate system and house division methods determine planetary positions. Accurate birth time is important for correct house cusps and angles.
For an overview of chart calculation basics, see Cafe Astrology basics.
