Moon

The moon is Earth’s major satellite, which is called Luna. Seen from the Earth, the surface of the Moon appears bright with distinct, darker areas. The bright regions form a rugged terrain, heavily marked with circular meteorite impact craters known as the lunar highlands. We now know that the highlands are made of rocks called anorthosite and polymict breccia. The anorthosite is a rock made largely from a white calcium aluminum silicate mineral called plagioclase, while the polymict breccia consists mainly of angular pieces of anorthosite and other materials broken and compacted together by many meteorite impacts.