Who is the first of the twelve constellations? who is it?

Aries is the first house of the zodiac.

1. Scientific name: Aries, the head of the zodiac.

Center position: right ascension 2: 40, declination 2 1. Between Pisces and Taurus. α, β and γ (Building 3, Building 1 and Building 2) are about 20 degrees south of Andromeda γ. α is a second-class star, which forms an isosceles triangle with Andromeda β and γ. There are five stars above level 4 in the constellation.

The first house of the zodiac, whose longitude ranges from 0 degrees to 30 degrees, was originally in Aries, hence its name. But due to precession, it has now moved to Pisces. On March 2 1 every year, the sun comes to this palace. At that time, the solar term was the vernal equinox, so the vernal equinox was also called "the first point of Muyang Palace".