Moon

formation of the moon

Most astronomers think that the Moon was formed when a Mars-sized asteroid collided with Earth about 4.5 billion years ago. Molten rock from the two bodies splashed into space and formed a ring of material round the young Earth. In time, the material clumped together to form one new, large body. This was the young Moon, which then cooled, solidified, and formed a surface crust.

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