The mysteries of the universe are profound but one solution has long been sought; how events at the edge of our solar system, the beginning of the rest of the universe, brought about evolution of earth, the other planets, and even life itself. A new paper
speculates about how the gas giants — Jupiter, Saturn, Uranus and Neptune — ended up where they are, orbiting the sun like they do. They try to figure an explanation for what happened to gas giants in other solar systems and ours- and try to make an education guess if a fifth gas giant lurks 50 billion miles away. A new planet 9, or a planet 14, or whatever a tiny minority of astronomers in the IAU try to decree.