八大行星英语演讲

Mercury (水星): ——The Mercury is the smallest of the planets and the one nearest the sun, having a sidereal period of revolution about the sun of 88 days (水星是行星中最小且离太阳最近的星，围绕太阳公转所需的周期为88天。) Mars (火星): ——The Mars is the fourth planet from the sun, having a sidereal period of revolution about the sun of 687 days. (火星是距太阳距离居第四位的行星，绕太阳公转周期为687天，). Venus (金星): ——The Hesper is the planet Venus in its appearance. The Venus is the second planet from the sun, having a mass 0.815 times that of Earth, and a sidereal period of revolution about the sun of 224.7 days. When appearing as the evening star, it can be called Hesper/Hesperus. (金星是离太阳第二远的行星，它的质量是地球质量的0.815倍，绕太阳转的公转周期为224.7天。傍晚出现时称作长庚星) Saturn (土星): ——It is the sixth planet from the sun and the second largest in the solar system, having a sidereal period of revolution about the sun of 29.5 years and a mass 95 times that of Earth. (土星是距太阳第六远的行星，是太阳系中第二大行星，绕日公转周期29.5年，质量是地球的95倍。) Jupiter (木星): ——The Jupiter is the fifth planet from the sun, the largest and most massive in the solar system, having a sidereal period of revolution about the sun of 11.86 years. (木星是靠近太阳的第5颗行星，也是太阳系中最大的行星，绕太阳公转的恒星期为11.86年。) Uranus (天王星): ——The Uranus is the seventh planet from the sun, revolving about it every 84.07 years. (是离太阳第七近的行星，每绕太阳一周为84.07年。) Neptune (海王星): ——The Neptune is the eighth planet from the sun, having a sidereal period of revolution around the sun of 164.8 years.（是太阳的第八颗行星。围绕太阳公转的恒星周期为164.8年） Pluto (冥王星): ——The Pluto used to be the ninth planet in the solar system, but now it is listed as the Dwarf Planet. （冥王星曾经是太阳系的第九颗行星，但是现在被列为矮行星。）