321 what constellation

Does the subject ask "What constellation is March 21st?" Aries.

Aries, corresponding to the first house of the zodiac in western astrology, is located at ~ 3 degrees of the zodiac, and is the constellation corresponding to the birth date from March 21st to April 2th. The ruler is Mars, and the representative color is red. In astrology, Aries is masculine in the constellation dichotomy combined with the theory of Yin and Yang. According to the western material composition theory, Aries belongs to the fire sign in the quartering method which classifies the twelve constellations according to the fire, wind, water and soil attributes. Aries symbolizes a ram, which can also be interpreted as its horn and nose. Its Latin is Aries, which means ram. The Greeks call it Krios and the English name is theRam. In mythology, this constellation is Zeus' effort to save the ancient Greek prince Boeotia by reading rams, and put its image in the sky, which is Aries. From before 2 BC to the first year of AD, it was the Aries era. This era symbolizes military force and enthusiastic expansion, such as the establishment of the Greek and Roman Empire and Moses' departure from Egypt.