Constellation is actually an arrangement of several unrelated stars in the sky. Is this sentence correct?

The accurate definition of constellation is: a constellation refers to a group of stars in the sky that are projected on the celestial sphere and have similar positions. There are three points here, one is "a group", not "a few"; The second is the projection on the celestial sphere; Not the sky. Third, the projection positions are similar; The fourth is the star combination; Unarranged images. The so-called image is just human imagination.

The size and range of constellations and which or how many stars are divided into a constellation are completely artificially defined.