The moon's circular craters are the result of flying objects such as meteorites crashing into the moon's surface. This contact is known as an impact, and the resulting crater is officially known as an impact crater. More »

The International Astronomical Union (IAU), an organization of astronomers, names the craters on planets and moons in the solar system by giving each planet a creative theme. For example, the moon’s craters are usually n... More »

There are no impact craters on Io because it's so volcanically active that any impact crater is covered up by the flow of lava. Io has over 400 volcanoes, which makes it even more volcanically active than Earth. It is th... More » Science Astronomy Planets

The moon's surface is solid and rocky, covered with many small and large craters caused by impacts. The lunar surface also consists of mountains, massive rocks and cracks that may have formed from lava flow. The moon is ... More »

Thanks to six moon landings, hundreds of objects are still scattered across the surface of the moon: golf balls, boots, cameras, javelins, sculptures, photographs, and a golden olive branch. Because the moon doesn't have... More »

The lunar highlands are elevated areas on the moon that were created by material that accumulated in layers from the ejecta of craters. The highlands are riddled with craters and the rocks found there are thought to be b... More »

Lunar features are the physical characteristics present on the moon, such as the craters, maria and highlands. The maria are the dark, flat plains on the moon whereas the highlands are raised areas on the surface of the ... More »