| 1. | Yet there are fundamental differences between these two outer - planet missions
但是这两次外行星任务有重大的差异。 |
| 2. | It should be capable of detecting exoplanets smaller than the earth
这架望远镜能够侦测到体积比地球还小的系外行星。 |
| 3. | Extrasolar planetary system
太阳系外行星系 |
| 4. | It has been designed to spot exoplanets bigger than twice the size of the earth
这艘太空船是用以捕捉体积在地球两倍以上的系外行星的踪影。 |
| 5. | All but three appear , by their great size and low density , to be gas giants
这些系外行星都是体积庞大且密度极低的气态巨星，只有三个例外。 |
| 6. | Most of the exoplanets discovered so far are much closer to their host stars than the ice line
至今所发现的系外行星中，大多行星同主星的距离小于冰线。 |
| 7. | The first such new world was discovered in 1993 by researchers at pennsylvania state university
1993年，宾夕法尼亚州立大学的研究人员首次发现了一颗系外行星。 |
| 8. | Planetary opposition happens when the earth lies between the sun and the planets in a straight line
指地球处于太阳和行星之间的直线上，只有外行星才有冲的现象。 |
| 9. | Since 1991 observers have discovered some 120 exoplanets ? worlds outside our solar system
自1991年起，天文学家已在我们太阳系外的世界，发现了大约120个系外行星。 |
| 10. | In this lecture , the history of discovery , detection methods , special stories and prospect will be discussed
这讲座探讨了系外行星发现的历史、方法、故事与展望。 |
