Lunar craters form mainly when meteoroids or larger pieces of rock strike the surface at high speed. The energy of an impact throws material outward and leaves a round depression, often surrounded by a raised rim.
On Earth, wind, water, plants and the movement of the crust gradually erase similar scars. The Moon has almost no atmosphere and no flowing water, so many of its craters can remain visible for billions of years.
Craters are easiest to examine when the boundary between lunar day and night crosses them. Low sunlight produces long shadows that reveal the shapes of depressions, peaks and mountain-like rims.
The Moon is one of the first larger objects players can create in Planetki. Its distinctive craters make it instantly recognisable both in the game and in the real sky.