asteroid; minor planet; planetoid

1. 小惑星最大的小行星之一，第二個(gè)被發(fā)現(xiàn)
   One of the largest asteroids, the second to be discovered.
2. 伊卡魯斯一個(gè)具有離心軌道的小行星，它在離太陽三千萬公里（一千九百萬英里）的范圍內(nèi)接近太陽
   An asteroid with an eccentric orbit approaching within30 million kilometers(19 million miles) of the sun.
3. 流星體活動在空間的固體天體，比小行星小，至少與塵埃一樣大
   A solid body, moving in space, that is smaller than an asteroid and at least as large as a speck of dust.

小的英語翻譯：

行星的英語翻譯：