Each planet has its own axis that it rotates on around the Sun, including our planet Earth. An axis is an invisible line that an object rotates around. The 12 zodiac horoscope wheel is based on Earth’s yearly rotation on its axis around the Sun, while the 12 astrological houses wheel is based on Earth’s 24-hour rotation around its own axis. Just as each of the 12 zodiac signs and their ruling planets have their own specific meanings and purposes in astrology, the 12 astrological houses also have their own specific meanings and purposes in astrology. Here is an astrology houses chart that explains each of the 12 houses in astrology.