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Asked by away520kudu to williamtolmie, Michael S, Martin M on 4 Nov 2024.
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Martin McCoustra answered on 4 Nov 2024:
The Moon was made when a large asteroid collided with the young Earth and broken off part of it to become the Moon
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Comments
Sheridan commented on :
Moons can also be captured objects, ie when a body such as Phobos or Deimos (moons of Mars) are passing very close to the planet and get caught in its gravity. This is the most likely explanation for moons that orbit their planet in a retrograde way.