Why are there only 88 constellations in the universe?

The number of stars that can be seen around the earth is limited. According to classical astronomy, stars are embedded in a celestial sphere with an infinite radius centered on the observer. If the planets visible to the naked eye in the whole universe are divided into 88 constellations, of course, this 88 is artificially stipulated, and there are other divisions, which are only not recognized internationally.