The Moon As It Is Today

Over 4.4 billion years, lunar tides caused the Earth to slow to its present spin rate of once every 24 hours and the moon to move gradually away from the Earth to its present distance of about 385,000 kilometers (240,000 miles). Even now, the process continues, though more slowly, as the moon recedes from the Earth at 3.75 centimeters (1.5 inches) per year, or about 3.6 meters (4 yards) per century.

The moon has changed little for several billion years. Newer craters have formed atop older ones and the regolith has gradually deepened, but there are no more magma flows–most scientists think the moon long ago became totally cold and solid—and no more huge impacts.
Scientists believe this is probably how the moon was created and how it developed, but even now they aren't certain that they have learned the true history of the moon. The giant-impact theory best fits the evidence we have, but as scientists continue their research, other theories may yet replace it. However, one thing will probably never change—the sense of wonder that people feel when they gaze up at the moon.