Why does the Earth have a moon?

Related questions

1. Is there a plural of axis?
2. How do you know which axis to plot on?
3. What is the axis on a chart?
4. What keeps the Earth spinning?
5. Is class singular or plural?
6. What is the plural of axis?
7. What is the axis of the Earth called?
8. Does the earth rotate east to west?
9. Is the sun orbiting something?
10. What causes a spin?

Tags

1. #widely
2. #sized
3. #earth
4. #giant
5. #rotation
6. #accepted
7. #theia
8. #explanation
9. #impact
10. #debris
11. #synchronous
12. #formed
13. #shows
14. #between
15. #always
16. #after
17. #called