STRUCTURE OF THE EARTH. Differentiation of Earth Earth is divided into layers based on density and composition Solid Layers – Core (iron-nickel) – Mantle.
Introducing the Moon! A primer on lunar formation and evolution Lillian R. Ostrach 5 June 2012 A17 Se T LROC WAC, RGB = 689, 415, 320 nm [NASA/GSFC/ASU]
Introducing the Moon!