Const
Planetary rulerships (domiciles)
Each planet rules one or two signs. Traditional rulerships include Mars ruling both Aries and Scorpio. Modern rulerships assign outer planets to Scorpio (Pluto), Aquarius (Uranus), and Pisces (Neptune).
Ptolemy's Tetrabiblos, Book I, Chapter 18
Planetary rulerships (domiciles)
Each planet rules one or two signs. Traditional rulerships include Mars ruling both Aries and Scorpio. Modern rulerships assign outer planets to Scorpio (Pluto), Aquarius (Uranus), and Pisces (Neptune).