Rebel Exoplanet GJ 3090 b Orbits at 136° Tilt, Defying Formation Models

Astronomers report that exoplanet GJ 3090 b orbits its star at a 136-degree inclination, opposite to the star's rotation, with no massive companion to explain the tilt. This challenges current planetary formation and migration theories, which typically require a perturbing body to produce such retrograde orbits. The finding is based on observational data, but the underlying mechanism remains uncertain.