Why is Pluto not a planet?

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Tags

1. #orbits
2. #orbit
3. #planet
4. #pluto
5. #addition
6. #object
7. #large
8. #demoted
9. #enough
10. #dominate
11. #fledged
12. #neighborhood
13. #become
14. #force
15. #according
16. #gravity
17. #around
18. #definition
19. #round
20. #because