12. N U

13. Neptune crossing 3:22:1 Plutinos classical KBOs scattered KBOs N U

14. J S U N P

15. Jupiter Saturn Uranus Neptune Mercury Venus Earth Mars Pluto Asteroid belt

16. Jupiter Saturn Uranus Neptune Mercury Venus Earth Mars Pluto Asteroid belt ?

17. Jupiter Saturn Uranus Neptune Mercury Venus Earth Mars Pluto Asteroid belt ? Kuiper belt

18. J S U N P

19. # discovered KBOs Uranus Neptune Pluto Quaoar SJ

20. Uranus Neptune Pluto Quaoar SJ

21. 50100 0 heliocentric distance number

22. 50100 0 heliocentric distance number r -3/2

23. 50100 0 heliocentric distance number r -11

24. Jupiter Saturn Uranus Neptune Mercury Venus Earth Mars Pluto Asteroid belt ? Kuiper belt

25. Jupiter Saturn Uranus Neptune Mercury Venus Earth Mars Pluto Asteroid belt Kuiper belt The edge of the solar system > inner

26. 20,000 – 100,000 AU

35. ?

37. J S U N P

42. a=480 AU e=0.85 i=12 q=76 AU Q=900 AU P=10,500 yr

44. Where did it come from? -in situ formation -scattered by modest-sized planet @ ~70AU -close stellar encounter

45. Where did it come from? -in situ -scattered by modest-sized planet @ ~70AU -close stellar encounter

46. Where did it come from? -in situ -scattered by modest-sized planet @ ~70AU -close stellar encounter -dense stellar birth environment