Several lines of evidence show that if the Moon has an iron-rich core, it must be a small one.

It is a fully differentiated body with an iron-rich, liquid core.

It is over the Earth's iron-rich core, which takes up about 15% of Earth's volume.

Changes over time scales of a year or more mostly reflect changes in the Earth's interior, particularly the iron-rich core.

Gas giants also have iron-rich cores.

The Moon has the same composition as Earth's crust but does not contain an iron-rich core like the Earth's.

Mercury's density implies a solid iron-rich core that accounts for about 60% of its volume (75% of its radius).

Mariner 10 also discovered that Mercury has a tenuous atmosphere consisting primarily of helium, as well as a magnetic field and a large iron-rich core.

An iron planet is a type of planet that consists primarily of an iron-rich core with little or no mantle.

This dynamo effect would result from the circulation of the planet's iron-rich liquid core.