To me i research Newton theorized and it is now commonly taught that the Earths ocean tides are caused by gravitational lunar attraction. If the Moon is only 2,160 miles in diameter and the Earth 8,000 miles, however, using their own math and law, it follows that the Earth is 87 times more massive and therefore the larger object should attract the smaller to it, and not the other way around. If the Earths greater gravity is what keeps the Moon in orbit, it is impossible for the Moons lesser gravity to supersede the Earths gravity, especially at Earths sea-level, where its gravitational attraction would even further out-trump the Moons.