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Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 20% of Earth's radius or 70% of the Moon's radius. [1] [2] There are no samples of the core accessible for direct measurement, as there are for Earth's mantle. [3]
Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 19% of Earth's radius [0.7% of volume] or 70% of the Moon's radius. [32] [33] The inner core was discovered in 1936 by Inge Lehmann and is generally composed primarily of iron and some ...
The internal structure of the inner planets. The internal structure of the outer planets. A planetary core consists of the innermost layers of a planet. [1] Cores may be entirely liquid, or a mixture of solid and liquid layers as is the case in the Earth. [2]
Earth's inner core, a super-hot and super-compressed ball of iron smaller than the moon, helps generate the Earth's magnetic field and, by extension, the aurora borealis -- or Northern Lights.
A team at Australian National University (ANU) has found evidence of a new layer to the planet sitting within the inner core. This "innermost inner core" is an iron-nickel alloy ball that, as ...
Just as the Earth spins, the planet’s inner core turns, though not necessarily at the same speed, and some research indicates the core moves faster, according to the National Science Foundation.
The existence of an inner core was proposed by Adam Dziewonski and Miaki Ishii to explain the discrepancies in certain fits to travel-time wave models of the inner core. [1] It is contested whether the innermost inner core is a distinct entity, and it is claimed that the data can be explained in other ways.
We know it’s kind of weird in there, and it turns out that hyperactive atoms and “soft” iron may be the cause.