Institute for Advanced Study Informal Astrophysics Seminar

I will discuss several problems in (exo)planetary dynamics, all involving somewhat surprising behaviors of vectors tugging one another. (1) Binary-disk-star interaction leading to the formation of misaligned protoplanetary disks; (2) Gentle gravitational purturbation from a binary companion on planets leading to the formation misaligned hot Jupiters; (3) Extented transiting disks and rings around exoplanets and brown dwarfs; (4) Hidding planets in multi-planet systems; (5) Solar obliquity induced by planet IX.