Late evolution of planetary systems

This chapter discusses some of the main effects of the interaction of planets with remnant planetesimal disks, after the disappearance of the gas. It focuses on planet migration and its possible outcomes. In particular, we discuss the possibility that the migration of the planets leads them into an unstable configuration which changes drastically the structure of the system. The late heavy bombardment (LHB) of the terrestrial planets, occurring 650 Myr after planet formation, is a strong indication that this kind of evolution occurred in our solar system. Other stars show evidence of intense comet showers, which may indicate that LHB-analogs are ongoing in those systems at the current time.

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