1Solar System - with the Sun (太陽) which is a star (恆星) at the core being circled by nine planets (行星) which include Mercury (水星), Venus (金星), Earth (地球), Mars (火星)﹐ Jupiter (木星), Saturn (土星)﹐ Uranus (天王星), Neptune (海王星), Pluto (冥王星). The planets may also have satellites (衛星) orbiting them.