Which planet is smaller than Earth's core?

Question:

Which planet is smaller than Earth's core?

Earth's Core:

The core of planet Earth is actually made up of two core layers. The first is the inner core, this is estimated to have a diameter of around 2,440km. The outer core, surrounding the inner core, is close it 4,532km thick. This gives the total core, both inner and outer, a diameter of about 6,792km in diameter.

Answer and Explanation:

Determining which planet, or planets, would be smaller than Earth's core depends on which definition of core you use and what you consider a planet....

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Earth's Internal Layers: Crust, Mantle & Core

from Earth Science 101: Earth Science

Chapter 4 / Lesson 4
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