Why Pluto is not a planet anymore?

Related questions

1. Do all black holes have the same density?
2. Who survived the Deepwater Horizon?
3. What's beyond the observable universe?
4. How big is a black hole?
5. What is beyond an event horizon?
6. Are there 12 planets?
7. What is the monster in Event Horizon?
8. What is Event Horizon in black hole?
9. How many died on the event horizon?
10. How hot is a Kugelblitz?

Tags

1. #during
2. #assembly
3. #their
4. #which
5. #international
6. #union
7. #scattered
8. #formally
9. #reclassified
10. #general
11. #excluded
12. #planet
13. #pluto
14. #define
15. #astronomical
16. #dwarf
17. #massive
18. #discovered
19. #definition