| 1. | Rather, we infer that planetary systems must be quite common .
相反，我们的结论是行星系统的存在一定相当普遍。 |
| 2. | It is reasonable to suppose that other stars are also attended by planetary system .
有理由猜测别的恒星也伴有行星系统。 |
| 3. | These tiny regions may be condensations in the interstellar gas where stars and planetary systems could be forming .
这些很小的区域可能是能够形成恒星或行星系统的星际气体中的一些凝聚体。 |
| 4. | By definition , interplanetary travel is travel between bodies in a given star system
星系旅行是指在给定的行星系统内在不同星体间的旅行。 |
| 5. | A number of studies indicate that clouds enriched in heavy elements are more likely to form stars with planetary systems
一系列研究表明，富集了重元素的气体云更容易形成拥有行星系统的恒星。 |
| 6. | The same principle applies to other natural phenomena such as ocean waves , various kinds of trees and even planetary systems
相同的原理可推广到其他的自然现象，例如大海中的波浪不同种类的树，甚至宇宙中的行星系统。 |
| 7. | Under proposed international astronomical union definitions , two planets that orbit each other around a barycenter between them are a binary planet
根据国际天文学会的定义提出两个行星轨道周围的重心在彼此之间是双行星系统。 |
| 8. | Circle of the empyreal sovereignty now spans 20 star systems within 100 light years of new delta with a total population of 16 . 5 billion centaurus citizens
崇高界政权在在一百光年之内，扩展了20个行星系统，半人马星座居民的总数达到163亿。 |
| 9. | Astronauts today tuesday announced the discovery of another planet obeying orbiting a distant star , making it the most crotic crowded planetary system outside our role own
天文学家周二宣布发现了一颗绕固定恒星运行的行星，这就构成了大气层外最拥挤的行星系统。 |
| 10. | Studying these giant planets and their weird satellites helps us understand not only the formation of the solar system but also the planetary systems of extrasolar worlds
研究这些巨行星和它们千奇百怪的卫星，将有助我们了解太阳系的形成过程，以至太阳系外其他的行星系统。 |
