"The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner solar system. Earth and Theia are likely to have been neighbors."

Earth and Theia smashed to birth the moon, but did they first start out as close neighbors?

Source: space
Source Link: https://www.space.com/astronomy/earth-and-theia-collided-to-birth-the-moon-but-did-they-first-start-out-as-close-neighbors