Space Exploration Quiz

5. What the moon is lacking.
7. Separates white light into wavelengths of colour.
8. When the moon comes between the earth and the sun.
10. The changing appearances of the moon.
11. Cloud of gas and dust.
14. What the universe is doing.
15. People who study objects in space.
16. 13.7 billion years ago, a tiny volume of space suddenly and rapidly expanded into an immense size.
18. Arms spiral out from the centre core.
20. When giant stars explode!

1. A lot of matter in a little space; strong gravitational pull.
2. The understanding that the sun is the cener of the solar system.
3. The belief that the earth was the center of the universe.
4. All existing matter and space.
6. The sun, moon, planets and stars.
9. Football or cigar shaped.
12. When the earth comes between the moon and the sun.
13. Object in space made up of hot gases.
17. A system of millions of stars, gas and dust held together by gravitational attraction.
19. A celestial object blocks the normal view of another celestial object.