What is the ecliptic on the star map, and what is its relationship with the constellations and stars in the Milky Way?

The ecliptic is the annual apparent motion route of the sun observed on the earth. In fact, the ecliptic reflects the earth's orbit around the sun. In ancient times, people divided the zodiac into 12 palaces, and each palace was named after a constellation, namely Zodiac Palace 12. There are actually 13 constellations on the ecliptic. The orbital plane of the planet is very close to the orbital plane of the earth, and the maximum is no more than 7 degrees, so both the planet and the moon appear near the ecliptic.