Earth's Moon (Luna):
Surface Features: The Moon's surface is covered with various features, including impact craters, mountains, valleys, and large flat plains called maria. It lacks an atmosphere, so erosion and weathering processes are minimal.
Composition: The Moon is primarily composed of rocks rich in silicates, such as basalt and anorthosite. It also contains small amounts of metals like iron and traces of water ice in permanently shadowed regions.
Structure: The Moon has a layered structure, with a crust, mantle, and a small core. The crust is thinner on the near side and thicker on the far side. The absence of tectonic activity has resulted in fewer geological changes compared to Earth.
Distance from the Planet: The Moon is Earth's only natural satellite and is located at an average distance of about 384,400 kilometers from Earth.
Saturn's Moon, Titan:
Surface Features: Titan has a diverse surface, including vast dune fields, lakes, and rivers of liquid methane and ethane. It also has mountains and cryovolcanoes that erupt with icy materials instead of molten rock.
Composition: Titan's surface is composed of a mixture of water ice, hydrocarbons, and organic compounds. Its atmosphere is primarily nitrogen with traces of methane and other hydrocarbons.
Structure: Titan has a rocky core, surrounded by layers of water ice and a thick atmosphere. The presence of lakes and rivers of liquid methane suggests the possibility of a subsurface ocean of liquid water beneath the icy crust.
Distance from the Planet: Titan is the largest moon of Saturn and is located at an average distance of about 1.2 million kilometers from Saturn.