Kissing moons may explain why Earth's moon is so large
The larger moons of Pluto and Earth likely formed through a collisional process with Charon and our moon, respectively, rather than by gravitationally capturing them. Due to Pluto and Charon's rocky, icy nature, their collision was more of a gentle short-lived kiss.
from CBC | Technology News https://ift.tt/uDEqv40
Kissing moons may explain why Earth's moon is so large
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