Constellations are groupings of stars that humans have imagined into shapes and stories over millennia. They are not governed by any single entity.

You might be thinking of mythology, where specific deities might be associated with certain constellations. For example:

* Ursa Major (The Great Bear): In Greek mythology, it's associated with Callisto, a nymph transformed into a bear by Hera.

* Orion: In Greek mythology, Orion is a great hunter who was placed in the sky after his death.

However, these are just stories and not actual rulers. Constellations are simply star patterns in the sky, and their significance is based on human interpretation.