用英语简短的介绍一下八大行星地球就不用介绍了水星mercurial,火星 Mars,金星Hesper Hesperus Venus phosphorus,土星 Saturn 木星 Jupiter 天王星,Uranus 海王星,Neptune Neptunian 冥王星 Pluto 每个星球只要简短的介绍一句话就行了 10句话就差不多了,关于某个星球你知道什么就写什么，一句话就行，但不能太离谱啊！

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):
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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):
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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.）