Which solar term is it when the sun runs to longitude 180?

As we know, the earth orbits the sun for about 365 days and more than five hours, with a journey of 940 million kilometers. The revolution of the earth is manifested as the annual apparent motion of the sun for people on the earth, and its running route (that is, the reflection of the earth's orbit on the celestial sphere) is called the ecliptic. The zodiac is the measuring coordinate (longitude) on the ecliptic. According to astronomical practice, it is measured from west to east from the vernal equinox and divided into 360 degrees. The solar yellow meridian where the earth is located in the twenty-four solar terms indicates the date when the solar term yellow meridian month appears.

Beginning of spring 3 1524(5, 6)

Rainwater 3302 19(20)

Sting 34536(5)

Vernal equinox 36032 1(20, 23)

Qingming 1545(4, 6)

Grain Rain 30420(2 1, 23)

Changxia 4556(5, 7)

Xiaoman 6052 1(20, 22)

Mangzhong 7566 (5,7)

Summer solstice 90622(2 1)

Xiaoshu 10577(8)

Summer 120723(24)

Beginning of autumn 13588(7, 9)

Summer 150823(24)

Millennium 16598(7, 9)

Autumnal Equinox 180923(24)

Cold dew 195 108(9)

The first frost 2 10 1024(23)

Beginning of winter 225 1 18(7)

Xiaoxue 240 1 123(22)

Heavy snow 255 127(8)

Winter solstice 270 1222(23)

Xiaohan 285 16(5)

Great Cold 300 120(2 1) The ancients in China divided the 360-degree meridian of the sun into 24 equal parts, each equal part being 15 degrees, which is a solar term. The interval between two solar terms is about 15 days, and there are 24 solar terms throughout the year.