Etc. etc. etc.

NU

Neptune crossing

3:2 2:1Plutinos

classical KBOs

scattered KBOs

NU

J

S

U

N

P

Jupi

ter

Satu

rn

Ur a

nus

Nep

tun

e

Mer

cury V

enu

sE

arth

Mar

s

Pluto

Ast

eroi

d b

elt

Jupi

ter

Satu

rn

Ur a

nus

Nep

tun

e

Mer

cury V

enu

sE

arth

Mar

s

Pluto

Ast

eroi

d b

elt

?

Jupi

ter

Satu

rn

Ur a

nus

Nep

tun

e

Mer

cury V

enu

sE

arth

Mar

s

Pluto

Ast

eroi

d b

elt

?

Kuiper belt

J

S

U

N

P

# di

scov

ered

KBO

s

Ura

nus

Nep

tune

Plut

oQ

uaoa

r

SJ

Ura

nus

Nep

tune

Plut

oQ

uaoa

r

SJ

50 1000

heliocentric distance

nu

mb

er

50 1000

heliocentric distance

nu

mb

er

r-3/2

50 1000

heliocentric distance

nu

mb

er

r-11

Jupi

ter

Satu

rn

Ur a

nus

Nep

tun

e

Mer

cury V

enu

sE

arth

Mar

s

Pluto

Ast

eroi

d b

elt

?

Kuiper belt

Jupi

ter

Satu

rn

Ur a

nus

Nep

tun

e

Mer

cury V

enu

sE

arth

Mar

s

Pluto

Ast

eroi

d b

eltKuiper belt

Th

e ed

ge o

f th

e so

lar

syst

em

>

inne

r

20,000 – 100,000 AU

?

J

S

U

N

P

a=480 AUe=0.85i=12

q=76 AUQ=900 AU

P=10,500 yr

Where did it come from?-in situ formation

-scattered by modest-sized planet @ ~70AU-close stellar encounter

Where did it come from?-in situ

-scattered by modest-sized planet @ ~70AU-close stellar encounter

Where did it come from?-in situ

-scattered by modest-sized planet @ ~70AU-close stellar encounter-dense stellar birth environment

10 x 0.6) (5.1 Al) / Al( -5 2726

Myr 7.0 Mg Al 2626 ht