What is the basis of constellation connection?

There are many stars in the sky, and there are about 6000 stars that people can see with the naked eye. In order to facilitate the memory and study of the starry sky, Babbitt divided the sky into many regions, which were called "constellations", and each constellation was identified by the special distribution of bright stars. The ancient Greeks divided the visible part of the sky into 48 constellations around 270 BC, connected the main bright stars in the constellations with imaginary lines, imagined them as people or animals, and gave them appropriate names in combination with fairy tales. This is the origin of the constellation name.

Therefore, the name is first imagined according to the way the stars are connected, rather than the constellation specifically requiring these stars to be connected.