When Moons Collide

Earth Had Two Moons That Crashed to Form One, Study Suggests - Yahoo! News:

"'It is entirely plausible for a Trojan moon to have formed in the giant impact, and for it to go unstable after 10 million to 100 million years and leave its imprint on the moon,' study coauthor Erik Asphaug, a planetary scientist at the University of California, Santa Cruz, told SPACE.com. Imagine 'a ball of Gruyere colliding into a ball of cheddar.'

The remains of this Trojan moon would make up the highlands now seen on our moon's far side. At the same time, the impact would have squished an underground ocean of magma toward the near side, explaining why phosphorus, rare-earth metals and radioactive potassium, uranium and thorium are concentrated in the crust there."

Be that as it may, I offer these images of the face we've all seen. Photography by Dee Puett; music by Incorporal Air. 



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