Its nickel-iron core is half the diameter of the world, the rest being rocky mantle and crust.

Recent ultrahigh-pressure achievements include the creation of chemical reactions that probably occur at the boundary between the Earth's molten-iron core and its rocky mantle.

Scientists have managed to recreate chemical reactions that occur at ultra-high pressure at the boundary between the Earth's rocky mantle and its molten core.

Our terrestrial planets have metallic cores of mostly iron, with rocky mantles and crusts.

A similar but weaker process is theorised to have melted the lower layers of the ice surrounding the rocky mantle of Jupiter's next large moon, Europa.

The molten core and its solid kernel are enveloped in a rocky mantle comparable to an apple's pulp.

Iron-rich planets may be the remnants of normal metal/silicate rocky planets whose rocky mantles were stripped away by giant impacts.

The high density of this world must mean it had no rocky mantle to speak of.

Much of our planet's rocky mantle was reduced to dust and hot gas and blasted into space.

The standard type of terrestrial planet seen in the Solar System, made primarily of silicon-based rocky mantle with a metallic (iron) core.