Planet formation extrasolar planets

Planet-formation studies uniquely benefit from three disciplines astronomical observations of extrasolar planet-forming disks, analysis of material from the early Solar System, and laboratory astrophysics experiments. Pre-planetary solids, fine dust, and chondritic components are central elements linking these studies. 

One mechanism to consider might be planetary migration (Lin et al., 1996 Murray et al., 1998). Observations of extrasolar planets provide strong evidence that planets migrate after their formation (Lin et al, 1996). Resonances are observed in extrasolar planetary systems possessing multiple Jupiter-like planets. These resonances can only be explained if the planets migrated after ffieir formation (Murray et al, 1998). Two kinds of models can be considered. 

Bodenheimer P., Hubickyj O., andLissauer J. J. (2(X)0) Models of the in situ formation of detected extrasolar giant planets. Icarus 143, 2-14. 

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