2 giant 'super Earths' once orbited near Uranus and Neptune, messed up a bunch of moons, then vanished, new study hints

Two extra giant planets may have once existed in our outer solar system, orbiting near Uranus and Neptune before being flung into interstellar space. A new study using over 100 simulations suggests these "super Earths" disrupted the orbits of other planets and their moons before disappearing. This could explain puzzling irregularities in how our solar system is arranged today.