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Researchers have unveiled new findings that reshape our understanding of the Moon's formation and Earth's early hydration.

The substantial difference is in the illumination percentage of the side facing the Earth. In the new moon phase, this percentage is 0% and becomes 100% at Full moon, about 14 days later.

Only when the moon, Earth and the sun are perfectly aligned is the moon 100% full. And sometimes — once in a blue moon — the moon is full twice in a month (or four times in a season ...

Even Earth's moon had a 95% chance of supporting a stable ring system in the simulations. "[W]e did not anticipate that moons in a hostile gravitational environment, with many other moons and ...