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In the Placidus system – not all houses are 30° – some may be larger than the others.Ĭalculating your birth chart by hand using Placidus isn’t easy, however, the Placidus system of astrology is the most popular house system used for online astrology calculators. It’s based on system of house division, popularized by Italian Benedictine monk Placido de Titus (1603-1668) and calculates the houses based on the tri-section of the semi-diurnal arc, a process that divides the distance and time between the Midheaven and the Ascendant. Placidus is the most commonly used house system in modern western astrology. Here’s a quick over–view of the most popular house systems used by modern astrologers in both Western and Vedic astrology: Placidus
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Most western astrologers use placidus, or whole sign. The houses in astrology are not astronomically fixed because they are based on your ascendant sign, which means modern astrologers use of different methods for dividing them up. One of the biggest decisions new astrologers make is choosing which house system they’d like to study. Understanding the houses in astrology is a key part to becoming a self–taught astrologer. In astrology, the twelve houses of the zodiac each represent a larger theme of your life such as your career, love life, sense of self-identity, and more. If you’ve been dabbling in astrology for any amount of time – you’ve likely been asked about the houses in your birth chart.