在選定類別中沒有足夠的詞彙來開始測驗。

詞彙測驗:

1. rotational modulation

2. exobiology

3. stellar remnant

4. solar flare

5. zenith

6. centaur

7. plane of reference

8. trans-Neptunian object

9. constellation

10. solar granule

11. telescope

12. ecliptic coordinate system

13. primary

14. corona

15. astrogeology

16. geocentric

17. main sequence

18. planetary science

19. nebula

20. perihelion

剩餘時間： 200 秒