BASICALLY... Iron and Nickel.
core
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The core is made up of Iron and Nickel.
iron nickel
core mantle crust
Mars is rocky.
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BASICALLY... Iron and Nickel.
Theories of the Earth's core composition are supported by meteorites that are composed of iron and nickel, similar to what is believed to be present in the Earth's core. This similarity suggests that meteorites could be remnants from the early solar system and provide clues about the Earth's core composition.
There is a large file on Jupiter's composition and other facts - in Wikipedia !
the outer core
The Earth's layers of rock are classified by their composition and physical properties. The main layers are the crust (continental and oceanic), mantle, and core (outer and inner). These layers are distinguished by differences in chemical composition, density, and temperature.