context: According to the current view, the moon's birth was probably due to the Mars-sized planet, Theia, colliding with the primordial Earth, as a result of the collision, orbiting the primitive earth orbiting the moon. Still, the exact origin of the moon is still not known for sure. Previously, the Moon was assumed to be born separately and the Earth to be captured by the Moon, a process that from the beginning produced the Earth and the Moon to orbit each other or the Earth to split itself.
question: Where did the moon come from?
answers.text: Mars-sized planet, Theia, colliding with the primordial Earth