What's the sign outside _ What's the sign outside?

Besides the twelve constellations, what other constellations are there? What is the difference?

Besides the twelve constellations, there is also Ophiuchus. The twelve constellations mentioned at ordinary times are the constellations divided by ancient Babylonian civilization. The concept of the ecliptic was put forward in the 6th century BC. Is the circle occupied by the earth's orbit around the celestial sphere. At that time, the zodiac, now because of the movement of stars, the zodiac.

Ophiuchus information: Ophiuchus is one of the zodiac signs, located in the south of Hercules, north of Scorpio and Sagittarius, and on the west side of the Milky Way. Ophiuchus is the only constellation connected with another constellation Ophiuchus. At the same time, Ophiuchus is the only constellation that spans the celestial equator, the Milky Way and the ecliptic. Ophiuchus is big and wide, rectangular, and the equator of the celestial sphere passes through this rectangle diagonally.

Extended data

Ophiuchus myth: Asclepius, who holds a serpent in his hands, is the god of medicine, the son of Apollo and Koronis. When Colonis was killed by the golden bird, the snake man tried to save her life. Later, Hades (called Pluto by the Romans) knew that he had violated the dogma, so he killed Asclepius with lightning.

Zeus added him to the constellation, and Ophiuchus was born.

Baidu encyclopedia-thirteen constellations

Baidu encyclopedia-Ophiuchus