詞彙測驗:

1. circumstellar disc

2. baryogenesis

3. planetary system

4. meridian

5. apsis

6. axial precession

7. bulge

8. nutation

9. standard gravity

10. sidereal period

11. minor axis

12. asterism

13. Tisserand's parameter

14. lunar phase

15. compact stellar nucleus

16. corona

17. perturbation

18. positional astronomy

19. Roche limit

20. perihelion

剩餘時間： 200 秒