位居太阳系九大行星末席70多年的冥王星,自发现之日起地位就备受争议。经过天文学界多年的争论以及第26届国际天文学联合会大会上数天的争吵,冥王星终于“惨遭降级”,被驱逐出了行星家族。从此之后,这个游走在太阳系边缘的天体将只能与其他一些差不多大的“兄弟姐妹”一道被称 Pluto, the last of the nine planets in the solar system for more than 70 years, has been the subject of controversy since its discovery. After years of controversy in the astronomy community and several days of quarrel at the 26th IAF General Assembly, Pluto finally “degenerated” and was expelled from the planet family. Since then, this celestial body that walks on the fringe of the solar system will only be able to be said to be along with a few other “siblings”