Here's why:
* Ancient Recognition: Orion is one of the most recognizable constellations in the night sky, easily identified by its distinct shape. Ancient civilizations around the world, including the Babylonians, Egyptians, Greeks, and Chinese, all had myths and stories associated with Orion.
* Not a "Discovery": Constellations are simply patterns of stars that humans have identified and named. They weren't discovered in a single moment, but rather evolved over time as different cultures observed the sky.
So, while we can't pinpoint a specific year, it's safe to say that Orion has been known and recognized for at least several thousand years.
