Simulations show an early resonant chain of terrestrial planets, including Theia, can be broken by the giant planet instability and yield a Moon-forming impact, with the present 3.05 Mars-Venus period ratio inherited from the original 3:1 resonance.
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A Resonant Beginning for the Solar System Terrestrial Planets
Simulations show an early resonant chain of terrestrial planets, including Theia, can be broken by the giant planet instability and yield a Moon-forming impact, with the present 3.05 Mars-Venus period ratio inherited from the original 3:1 resonance.