Tidal evolution of a Jovian-mass planet with initial semimajor axis a ₁ = 0.04 AU and e ₁ = 0.05. P ₀ is the stellar rotation period, while P ₁ is the planet's rotation period. The dashed green line in the bottom-left panel shows the planet's orbital period. The stellar and planetary obliquities (θ ₀ and θ ₁, respectively) are shown in the bottom-right panel and measured with respect to the inner planet's orbital plane. Both spin axes where initially chosen parallel to the orbital angular momentum vector.