Aries is the first house of the zodiac. The longitude of the ecliptic varies from 0 degrees to 30 degrees. It originally came from Aries, hence its name. But due to precession, it has now moved to Pisces. The sun comes to this house around March 2 1 every year, when the solar terms are vernal equinox, so in astrology, the vernal equinox is also called "Aries point".