planetary crust

…Surveyor suggest that the Martian crust is much thicker under the southern highlands than under the northern plains (see below The interior).

…layered body comprising a low-density crust, which ranges from 60 to 100 km (40 to 60 miles) in thickness, overlying a denser mantle, which constitutes the great majority of the Moon’s volume. At the center there probably is a small iron-rich metallic core with a radius of about 350 km…

…crust of Earth, however, the lunar crust is not recycled by tectonic processes, so it has preserved the records of ancient events. Highland rock samples returned by the later Apollo missions are nearly four billion years old, revealing that the Moon’s crust was already solid soon after the planets condensed…

… of dense rock, and a crust of less-dense rock. The core, like that of Earth, is probably composed primarily of iron and nickel, although Venus’s somewhat lower density may indicate that its core also contains some other, less-dense material such as sulfur. Because no intrinsic magnetic field has been detected…