| 释义 |
天王星tiānwángxīng太阳系九大行星之一,按离太阳由近而远的次序计为第七颗,绕太阳公转周期约84年,自转周期约为24±3小时,侧向逆转。光度较弱,用望远镜才能看到。{Uranus; the 7th of the 9 major planets in the solar system in terms of distance from the sun (period of revolution, about 84 years; period of rotation, about 24±3 hours), rotating laterally from east to west, with low luminance and visible only by telescope} |