Why does the earth have an atmosphere?

Related questions

1. Is Earth losing its atmosphere?
2. Does Mars have an atmosphere?
3. Who Discovered atmosphere?
4. Why does Earth have an atmosphere?
5. How is atmosphere useful to us?
6. Are gravitons real?
7. Which layer of the atmosphere contains the ozone layer?
8. Does Jupiter have an atmosphere?
9. What is in the thermosphere layer?
10. How did water get on earth?

Tags

1. #probably
2. #around
3. #these
4. #which
5. #hydrogen
6. #dusty
7. #planets
8. #earth
9. #moved
10. #atmosphere
11. #gases
12. #helium
13. #drifted
14. #gassy
15. #because
16. #original
17. #formed
18. #escaped
19. #space
20. #molecules
21. #gravity
22. #eventually