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.

2024年6月11日 · Earth’s core is the very hot, very dense center of our planet. The ball-shaped core lies beneath the cool, brittle crust and the mostly solid mantle . The core is found about 2,900 kilometers (1,802 miles) below Earth’s surface, and has a …

2024年7月5日 · Scientists say they’ve confirmed Earth’s inner core has been slowing down. Here’s what it could mean — and why the topic has been the subject of fierce debate.

The internal structure of Earth are the layers of the Earth, excluding its atmosphere and hydrosphere. The structure consists of an outer silicate solid crust, a highly viscous asthenosphere, and solid mantle, a liquid outer core whose flow generates the Earth's magnetic field, and a solid inner core.

2023年12月8日 · The Earth’s core is divided into two parts: the outer core and the inner core. The outer core is located beneath the mantle, beginning at a depth of about 1,800 miles (2,900 kilometers) and extending to around 3,500 kilometers below the surface. It is primarily composed of molten iron and nickel.

The Earth's core is the part of Earth in the middle of our planet. It has a solid inner core and a liquid outer core. The temperature of the outer core ranges from 4400 °C in the outer regions to 6100 °C near the inner core.

Our home planet is seeming more like a jawbreaker the more we learn about its interior. A new analysis of Earth's innards suggests the presence of an inner core within the inner core – a dense ball of iron at the very center of our planet.

2024年9月8日 · Deep beneath our feet, at a staggering depth of over 5,100km, lies Earth's inner core — a solid ball of iron and nickel that plays a crucial role in shaping the conditions we experience on the surface.

6 天之前 · With a radius of almost 3,500 km (2,200 miles), Earth’s core is about the size of the entire planet Mars. About one-third of Earth’s mass is contained in the core, most of which is liquid iron alloyed with nickel and some lighter, cosmically abundant components (e.g., sulfur, oxygen, and, controversially, even hydrogen).

3 天之前 · The Earth’s core is mostly made of iron, with up to 10% nickel and a small proportion of other elements. The temperature at the core-mantle boundary is close to 4000⁰ C and that gradually increases to about 5000⁰ C at the Earth’s center. In the outer part of the core that temperature is high enough for the iron-nickel alloy to be liquid ...