* Historically: Historically, different cultures around the world recognized and named their own constellations. This resulted in a wide variety of constellations with overlapping boundaries and different names.
* Modern Constellations: The International Astronomical Union (IAU) officially recognizes 88 constellations. These are standardized and have specific boundaries.
* Personal Constellations: People can still create and name their own constellations, but these are not officially recognized.
So, the answer depends on what you mean by "constellation":
* Officially recognized: 88
* Historically: Hundreds, if not thousands, across different cultures.
* Unofficial: Countless, depending on individual creativity.