* Historically: The constellations we see today are based on ancient traditions, with different cultures recognizing different groupings of stars. The International Astronomical Union (IAU) officially recognized 88 constellations in 1922, but these are just the ones they chose to formally name and define.
* Modern definitions: The IAU constellations are defined by specific boundaries on the celestial sphere, but these boundaries are somewhat arbitrary. They are not meant to be rigid groupings of stars, but rather areas of the sky that help us navigate.
* Personal constellations: Some people choose to create their own constellations based on personal preferences or cultural traditions. These are not formally recognized by the IAU, but they still hold significance for those who identify with them.
Therefore, while 88 constellations are officially recognized by the IAU, it's important to remember that this is just a starting point. The number of constellations in the sky is ultimately a matter of perspective.
