Origin of the Moon
The moon has been studied closely since the Soviets Luna mission in 1959 to the Apollo missions of the late 1960s and early 1970s. Although the missions allowed for close up examination of the moon and its structures, the origin of the moon is still argued among a couple of theories.
After formation, Earth and moon continued to grow through the impact of meteoroids which added energy and mass to their celestial bodies. These impacts created large craters and produced lava flows that reshaped the surfaces of both the Earth and the moon.
Properties of the Moon
The moon is characterized by light areas called lunar highlands and dark areas that are the great basins and plains of the moon called lunar maria.
Lunar Craters and Rays
Last modified: February 17, 2004