Forgetting the effects it would cause

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It would heavily affect the earth's gravity and tides, amongst other thing. Maybe destabilize it's orbit a little bit, i'm not sure.

Ummm 4 cm per year is that important? ill try to put that into a big picture. 4 kilometers per 100000 years. Doesnt seem like much. Just wondering if that would have any significant effects

Not really. It's moving away slowly enough that the sun will turn into a red giant before the moon leaves Earth's orbit