NASA has created a very interesting animated video, showing how it thinks the moon got all of its craters and markings. Scientists say that the moon formed when a giant object hit Earth around 4.5 billion years ago, causing a plume of material to shoot into space. That material, over many years, created the spherical shape of the moon.
At first, the moon was very hot and covered in magma. After the magma cooled, the moon was left with a smooth and untarnished surface.
But that didn’t last long. Because the young solar system was filled with many hazards traveling around space, the moon was bombarded with direct hits over time. The result? All the craters that you see today.
Take a look at how NASA think it all happened: