As the moon got larger but less dense, gravity would be decreased in half. Because its gravity is now one-sixth that of Earth, it should be even smaller. The gravity of the moon would rise with its size.
<h3>What explanation makes the above assertion clearer?</h3>
It is to be noted in addition to the above that because the Moon is greater in mass, the way the Moon and Earth interact will alter. Because the earth's gravity pulls on the moon and the moon pulls on the earth, if the moon were larger, the barycenter position would shift further away from the earth's center, causing an even greater wobble in the planet's rotation.
It would also imply that the moon would move slower around the Earth than it does now since, in order to preserve angular momentum, the speed must be reduced as the mass grows, while the distance remains constant. Monthly tides will vary in length and height.
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Full Question:
A model shows that the moon has grown to twice its size, yet it has remained in the same place. In one to two sentences, explain how this would impact the gravity between the earth and the moon.