* Solid Inner Core: Mercury's core is thought to be composed mainly of iron and nickel, with a solid inner core approximately 1,200 kilometers (745 miles) in radius.
* Liquid Outer Core: Surrounding the solid inner core is a liquid outer core, extending out to roughly 1,800 kilometers (1,118 miles) in radius.
* Significance: The solid inner core and liquid outer core are crucial for understanding Mercury's magnetic field. The rotation of the liquid outer core generates a magnetic field, similar to Earth's.
So, while Mercury does have a solid iron core, it's more accurately described as having a solid inner core and a liquid outer core.
