When and how are the constellations arranged?

Constellations are calculated according to the date of birth in the Gregorian calendar. The timetable of the twelve constellations is as follows:

Aries, March 21-April19;

Taurus, April 20-May 20;

Gemini, May 21-June 21;

Cancer, June 22-July 22;

Leo, July 23rd-August 22nd;

Virgo, August 23-September 22;

Libra, September 23rd-65438+1October 23rd;

Scorpio, 65438+1October 24th-165438+1October 22nd;

Sagittarius,165438+1October 23rd-65438+February 2nd1;

Capricorn, 65438+February 22nd -65438+ 10/9;

Aquarius, 65438+1October 20th-February18;

Pisces, February19-March 20.

Extended data

The twelve constellations are Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces.

More than 2000 years ago, the Greek astronomer Hipparchus (190 ~ 120 BC) divided the ecliptic into twelve segments to mark the position of the sun on the ecliptic.

The spring is divided into 0, and every 30 degrees away from the vernal equinox (that is, zero degree of the ecliptic) is a palace, and it is named after the main constellations contained in each palace at that time, which are Aries, Taurus, Gemini, Cancer, Lion, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces in turn, which are called the zodiac.

References:

Baidu encyclopedia entry-twelve constellations (astrological terms)