Something doesn’t quite add up about the orbits of our solar system’s eight planets and their hundreds of moons, a new study hints.
According to the research — which compared more than 100 simulations of our cosmic neighborhood’s early history — there may have once been two extra giant planets careening around the outer solar system, helping to reshape the orbits of the other planets before ultimately being kicked out into interstellar space.
Buffy Schildgen
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