Science / Astrology / Planetary Hours: A system devised by ancient astrologers that assigned one of the seven planets then known to each hour of the day. The first hour of sunrise was ruled by the planetary day ruler (Sunday, Sun; Monday, MORE
Technology / Motorcycle / Planetary Gear: A gear system that consists of one or more outer gears (or planet gears), rotating about a central gear (or sun gear). Planet gears are often mounted on a movable arm or carrier which also may rotate MORE
Science / Astrology / Superior Planets: Planets whose orbits are larger than Earth's. The term is sometimes restricted to the three outermost planets: Uranus, Neptune and Pluto. MORE
Science / Astrology / Major Planets: Those whose orbits lie outside the Asteroid Belt; Jupiter, Saturn, Uranus, Neptune and Pluto. Also referred to as outer and event planets. MORE
Science / Astrology / Inner Planets: The Sun and those planets whose orbits lie between the Sun and Asteroid Belt, namely Mercury, Venus, Moon and Mars. Alternatively termed minor planets. MORE
Science / Astrology / Rising Planet: Any planet that is near the Ascendant in the natal horoscope. Rising planets will have a significant influence on the personality. MORE