That's about 15 percent of the entire radius of the Moon. The inner core, the team found, also has a density of about 7,822 kilograms per cubic meter. That's very close to the density of iron .

This appears to be the case, to a rather stunning extent, in the instance of the reporting this week around new findings that researchers say shows the rotation of Earth’s inner core is slowing ...

What's more, they believe that the core is around 18 percent of Mars's radius, pretty similar in size to Earth's inner core, which is around 19 percent of Earth's radius. While the proportions are ...

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. A new study published in Nature Geoscience claims that the Earth’s inner core may ...