The rotation of a star and the revolutions of its planets are not necessarily aligned. This
article reviews the measurement techniques, key findings, and theoretical interpretations …

Astrophysical fluid bodies that orbit close to one another induce tidal distortions and flows
that are subject to dissipative processes. The spin and orbital motions undergo a coupled …

Because of gravitational interactions with their companions, the rotational dynamics of
planets and stars involve periodic perturbations of their shape, the direction of their …

The Rossiter-McLaughlin effect occurs during a planet's transit. It provides the main means
of measuring the sky-projected spin-orbit angle between a planet's orbital plane, and its host …

Tidal dissipation in star–planet systems can occur through various mechanisms, among
which is the elliptical instability. This acts on elliptically deformed equilibrium tidal flows in …

We perform one of the first studies into the non-linear evolution of tidally excited inertial
waves in a uniformly rotating fluid body, exploring a simplified model of the fluid envelope of …

In close exoplanetary systems, tidal interactions drive orbital and spin evolution of planets
and stars over long time-scales. Tidally forced inertial waves (restored by the Coriolis …

The growing body of observational data on extrasolar planets and protoplanetary disks has
stimulated intense research on planet formation and evolution in the past few years. The …

Motivated by modelling rotating turbulence in planetary fluid layers, we investigate
precession-driven flows in ellipsoids subject to stress-free boundary conditions (SF-BC). The …

The spin–orbit obliquity of a planetary system constraints its formation history. A large
obliquity may either indicate a primordial misalignment between the star and its gaseous …