How many constellations are the sky divided into?

The Congress of the International Astronomical Union held in Leiden, the Netherlands, clearly divided the whole sky into 88 constellation areas.

1928 The International Astronomical Union officially announced 88 constellations commonly used in the world. At the same time, it is based on the vernal equinox and equator of 1875. According to the different positions of 88 constellations on the celestial sphere and the appearance of stars, they are divided into five regions.

That is, the polar constellation in the northern sky (5), the constellation in the Polaris (40 ~ 90, 19), the zodiac constellation (12 near the ecliptic on the celestial sphere), the zodiac constellation (10) and the constellation in the southern sky (-30 ~-90).

Northern Sky Constellation (5): 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. Twelve constellations (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).

Raven constellation, Southern Fish constellation, Rabbit constellation, Carina constellation, Tail constellation, Compass constellation, Nautical constellation, Fufu constellation, Centauri constellation, Bojiang constellation, Shield constellation, Celestial Furnace constellation, Pumping constellation, Sculpture constellation, Microscope constellation and Dajue constellation.