| What we've ordered: |
What we've got: |
Planetary systems
- around 1/3(?) of main-seq. stars
- many planets
- spaced by a const. factor f=1.5-2.5
(perhaps obeying Titius-Bodes-law)
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Dominant giant planets
- >4% of main-seq. stars
- single planets (so far)
- no Saturns in sight (f>>1)
- disobeying Bode's law
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Giant planets
- not in all planet. sys. (<50%)
- not much heavier than Jupiter
- roughly Jupiter's radius
- Jovian-like composition & structure
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Giant "planets"
- %=?
- some much more massive than Jupiter
- radius=?
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Familiar orbits
- in equatorial plane of the star
- all in prograde motion
- slightly inclined
nearly circular
- a>5 AU for giants, any distance for terrestrial planets
- stably configured
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Unfamiliar orbits
- 'Hot' Jupiters - too close
- Normal Jupiters
- Eccentric
super-Jupiters
- Pulsar planets - some eccentric
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