| 1. | This is done in astronomy, with the help of the julian day .
天文学上就是借助儒略日来算的。 |
| 2. | Archaeoastronomy depends for its discoveries on experts in many disciplines .
考古天文学上的发现有赖于许多学科的专家。 |
| 3. | This uniformity of material and structure is perhaps the most striking discovery of stellar astronomy .
物质及其结构的这种一致性，也许是恒星天文学上的最惊人的发现。 |
| 4. | We are used to calling an instrument of this kind in optics a telescope, and the radioastronomical counterparts are therefore briefly named "radio telescope" .
在光学上我们通常称这种类型的仪器叫望远镜，因而射电天文学上的对应物简称为“射电望远镜”。 |
| 5. | Of the object is the angle sustained by it
在天文学上，我们习惯上会用角距 |
| 6. | This week , there were two big developments in astronomical science
本周在天文学上有两大进展。 |
| 7. | This week , there were two big developments in astronomical science
本周在天文学上有两个重大的发现。 |
| 8. | The convenient length unit for measuring distances between planets is the astronomical unit
在天文学上，太阳系内天体的距离惯用 |
| 9. | Gamma - ray bursts are considered as one of most mysterious phenomena of modern astronomy
伽玛射线爆发是现代天文学上最大的谜团。 |
| 10. | If the angle p is one arc second , then we define the distance d to be one
当偏移的角度为一角秒，星体与地球的距离即为天文学上所定义的一 |
