| 1. | The spiral nebulae are impressive objects .
旋涡星云是迷人的天体。 |
| 2. | The protoplanets were huge affairs .
原行星是一个巨大的天体。 |
| 3. | The earth is a dynamic body .
地球是一个能动的天体。 |
| 4. | Both target and projectile orbit the primary .
无论靶体还是射体都在绕主天体作轨道运动。 |
| 5. | Visual position measurements in astrometry are most affected .
天体测量学中视位置的测量受影响最大。 |
| 6. | It is an emanation from the distant orb of immortal light .
它是从远处那个发出不灭之光的天体上放射出来的。 |
| 7. | The various theories can be grouped into astronomical and terrestrial hypotheses .
各种理论可以分成天体说和地球说两大类。 |
| 8. | We are entering here into one of the most complex domains in astrophysics .
这里我们涉及到了天体物理学中最复杂的领域之一。 |
| 9. | Should the gyroscopes break down, the celestial system would take over .
如果陀螺仪发生故障，天体导航系统就会接替它继续进行工作。 |
| 10. | Nowadays astrophysics and astronomy have come to mean almost the same thing .
今天，天体物理学和天文学的含义已经变得差不多一样了。 |
