What are the sky constellations? What are the advantages of Sky Constellation?

There are 88 constellations in the sky. What are they? Why do we only say 12?

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 Constellations (42 in total): Temple of Heaven, Picture Frame, Fly, Mountain Case, Indian, Tian Yan, Flying Fish, Long Ruler, Swordfish, Clock, Rhododendron, Southern Triangle, Compass, Dragonfly, Telescope, Aquarius and Southern Cross (small constellation).

Crane, Corona, Wolf, Dog, Pigeon, Raven, Southern Fish, Rabbit, Carina, Marina, Compass, Navigation, Jade Buddha, Centauri, Bohe, Shield, Celestial Furnace, Pumping, Sculpture, Microscope and Giant.

In ancient times, the way to look at the starry sky was different because of different regions. Now the world has unified the sky into 88 regions and 88 constellations according to the constellation map.

The "constellation" we usually say refers to the "sun constellation"; That is, people on the earth are the center, and at the same time we can see which constellation the sun is in orbit (Greek zodiac: the circle made by animals, also known as the "zodiac"), so we can say what constellation that person is.

More than 2000 years ago, the Greek astronomer Hipparchus (190 ~ 120 BC) divided the ecliptic into twelve segments, and divided it into zero in spring.

Since the vernal equinox (that is, the ecliptic is zero), every 30 degrees is a palace, named after the main constellations contained in each palace at that time, namely Aries, Taurus, Gemini, Cancer, Lion, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces. And it's called the zodiac, with twelve constellations.

In short, the 88 constellation contains twelve constellations.

Extended data:

Twelve constellations Source:

The sun runs from west to east on the ecliptic and circles the sky once a year. More than two thousand years ago, there were roughly twelve constellations on a belt on both sides of the ecliptic. They are Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Goat, Aquarius and Pisces. People on earth can see them one after another in a year.

Babylonians observed these constellations for a long time, determined the ecliptic through observation, and divided the ecliptic into 12 equal parts, each equal part was 30 degrees, which was called 1 segment.

The sun orbits the ecliptic in 12 months 1 cycle, so it runs on the ecliptic once a month. In the eyes of the ancients, the sun was Apollo, and its resting place must be a magnificent palace. Therefore, they call a section of the ecliptic a palace.

In this way, the section 12 on the ecliptic becomes the "zodiac". The names of the zodiac signs are similar to the 12 constellation near the zodiac signs, namely Aries, Taurus, Twin Uterus, Cancer, Lion, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces.