* Ancient Observations: People throughout history, starting thousands of years ago, noticed patterns in the stars and used them for navigation, timekeeping, and storytelling.
* Cultural Interpretation: Different cultures across the globe recognized different patterns in the stars, and named them according to their own myths and legends.
* Modern Standardization: In 1922, the International Astronomical Union (IAU) formally recognized 88 constellations, and defined their boundaries.
So, it wasn't a single individual, but rather the collective efforts of humanity across cultures and throughout history that led to the constellations we know today.