There are a total of 88 constellations in the sky that have been officially recognized by the International Astronomical Union (IAU).

The IAU divided the sky into 88 different regions, each representing a different constellation. These regions are defined by specific boundaries and are known as "constellation boundaries." These boundaries were established in 1930 and were based on the work of Greek astronomer Claudius Ptolemy from the 2nd century AD.

Each constellation boundary covers a specific area of the sky and contains a group of stars that form the recognizable patterns we associate with each constellation. However, even within these defined areas, the number of stars and their arrangement may differ depending on the observer's location and the time of year.

It is important to note that while the boundaries of the constellations have been established, the stars within them are constantly moving and changing position over time due to their own movement as well as the movement of the Earth and other celestial bodies. Therefore, the boundaries themselves are not fixed and may need to be adjusted in the future.

In addition to their astronomical significance, constellations have also played a significant role in human history and culture. They have been used for navigation, timekeeping, and even storytelling, with many constellations having origins in mythology and folklore.

Overall, while the concept of 88 constellations may seem overwhelming, each one offers its own unique history and significance that makes it worthy of study and appreciation.