A passing star known as a stellar flyby could – in theory – cause changes in Neptune’s atmosphere that could – in theory – eventually cause the planets to collide with each other.
If there is a 0.1% change in the orbit of Neptune, the planets of the solar system may collide – Study
A passing star known as a stellar flyby could – in theory – cause changes in Neptune’s atmosphere that could – in theory – eventually cause the planets to collide with each other.