In Hellenistic, Vedic, Medieval and Renaissance astrology each house is ruled by the planet that rules the sign on its cusp. For example, if a person has the sign Aries on the cusp of their 7th house, the planet Mars is said to "rule" the 7th house. This means that when a planet is allotted a house, the planet's attributes will have some bearing on the topics related to that house within the life of the individual whose chart is being analyzed. This planet is considered very important for events specifically pertaining to that house's topics; in fact, its placement in the chart will have at least as much influence on the chart as the planets placed within the house. In traditional Western and Hindu astrology, each sign is ruled by one of the 7 visible planets (note that in astrology, the Sun and Moon are considered planets, which literally means "wanderers", i.e. wandering stars, as opposed to the fixed stars of the constellations).