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Moon Formation: Collision of Theia with earth

by

Ron Miller/Novapix

Reference

a-lun99-00025

Date

2017-01-15

4.5 billion years ago. The big splat. The impact peels the earth like an orange. Titanic masses of material from both planets are thrown into space. The core of Theia eventually sinks to the center of our planet, where it remains to this day.