The way stars are arranged in the sky. Doesn't your world do that? Find shape in the sky, and give them names and stories?

[He thought that was pretty universal, as evidenced by the star chart he found here.]

In my world, there are thirteen of them who are said to preside over the birth of people, depending on the time of year. And to each of them corresponds a certain power, and the constellation will choose a Star Master, a person who can wield this power.

I am the Lord of Aquarius, and this is where my visions come from.