名人大脚印姓名:韦妮莎·伯尼国籍:英国梦想:飞上天空成就:给天上的星星取名字NASA(美国国家航空航天局)的哈勃太空望远镜拍摄的冥王星和它的卫星“卡戎”(发现于1978年)的照片。在第八颗大行星——海王星于1846年被发现之后,对第九颗大行星的寻找开始了。在科学研究中,“X”表示未知。因为科学家当时并不确定是否存在第九颗大行星,所以他们将它称为“X行星”。1929年,亚利桑那州的洛厄尔天文台 Celebrity Footprints Name: Vanessa Burney Nationality: British Dream: Fly to the Sky Achievements: Name the Stars in the Sky Pluto and its Satellite “NASA” NASA Hubble Space Telescope Rong “(found in 1978) photo. After the eighth asteroid was discovered in 1846, the search for the ninth asteroid began. In scientific research, ”X “ means unknown. Because scientists were not sure at the time whether there was the ninth planet, they called it ”Planet X." 1929, Lowell Observatory, Arizona