First you bring a big army, destroy that planets army and their you go. Or you could have an election for ruler.
Saturn
Zeus didn't become its ruler, that would be Hades
He became ruler in 306 A.D.
He became ruler in the year 1456
Uranus is the ruler of Aquarius. Saturn is the co-ruler.
The planet Jupiter is named after the king of the Roman gods.
Kronos became ruler by eating his children
he became ruler of the Aztecs in 1502
Zeus became ruler by overthrowing his evil father, Kronos.
He was heir to the throne
That depends entirely on who "he" is.
1933