Why are there only twelve constellations?

Why is there only 12 constellation left in constellation 88?

In fact, only 12 is left in 88 constellations, mainly due to the ecliptic.

The International Astronomical Union divides the whole day into 88 constellations, so that every star in the sky belongs to a specific constellation. In other words, constellations are made up of stars, which is the division of spherical sky by human beings. Although there are 88 constellations, only 12 of the zodiac is located directly above the zodiac.

If the earth is taken as a reference, the sun seems to go around the earth. The sun moved slowly on the starry background for a year, just after a circle and returned to its original position. The so-called ecliptic refers to the route taken by the sun in this way. The ecliptic revolves around the earth at 360 degrees. Coincidentally, there is a constellation within or near 30 degrees this week, with a total of 12 constellations, and this 12 constellation is the so-called zodiac.

The essence of constellation

Astrology believes that constellations often indicate the changes of everything in the world in a causal way, especially the changes of people's fate or behavior. For example, astrology tries to explain people's character or destiny through human constellations. Although astrology is regarded as pseudoscience by astronomy, people can't deny that astrology can really explain some objective events that modern science can't explain, and many predictions in astrology have been verified.

In addition to astrology, constellations have many practical significance or scientific basis. In ancient times, the rise and fall of stars or constellations were often used to navigate and measure time. Especially for navigation and long-distance travel, the constellation is the steering wheel in the dark. For example, in the northern hemisphere, the Polaris in Ursa minor is the most important basis for confirming the direction.