Hi John and welcome! The constellations are a bit confusing at first. One thing to remember is that many of them were not ancient constellations. The ancients made groupings out of obvious shapes, Orion, Scorpius, Leo, Pegasus for example) Many of the modern 88 constellations are of relatively recent origin especially the southern ones and the current list was only settled in the 1920s. There are many defunct constellations that did not make the list as well. The history of constellations is quite interesting.
Malcolm
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