What is an astronomical constellation?

1922, the General Assembly of the International Astronomical Union decided to divide the sky into 88 constellations, and the names of the constellations basically conform to the historical names. There are nearly 6,000 stars visible to the naked eye, each of which can be classified as a unique constellation. Each constellation can be identified by the shape of the bright star inside. The 88 constellations in the whole day are: North Sky Constellation (5 constellations): Ursa minor (closest to the north celestial pole), Ursa major, Cassiopeia, Draco and Cepheus. Polaris constellation (19): Scorpio, Andromeda, Lupo, Auriga, Canis major, Foxes, Cygnus minor, Perseus, Shepherd, Pentecost, Backrow, Corona Nordica, Tmall, Lyra, Dolphin, Pegasus, Triangle. Zodiac (12): Cancer, Aries, Gemini, Aquarius, Virgo, Leo, Taurus, Pisces, Capricorn, Scorpio, Libra and Sagittarius. Constellation Zodiac (10): Sagittarius, Canine, Eagle, Ophiuchus, Ophiuchus, Sextant, Ophiuchus, Unicorn, Orion and Whale. Southern Constellation (***42): Temple of Heaven, Picture Frame, Fly, Mountain Case, India, Tian Yan, Flying Fish, Long Ruler, Swordfish, Clock, Rhododendron, Southern Triangle, Compass, Dragonfly, Telescope, Hydra and Southern Cross (1999).