Is the earth's core solid?

The Earth's inner core is the Earth's innermost part. It is primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70% of the Moon's radius. It is composed of an iron–nickel alloy and some other elements. read more

The Earth's inner core is the Earth's innermost part. It is primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70% of the Moon's radius. It is composed of an iron–nickel alloy and some other elements. read more

With her finding, the world learned that Earth's core is solid at the center and liquid on the outside. "The Earth has a radius of 6,371 kilometers (3,959 miles)," explains seismology professor Xiaodong Song of the University of Illinois at Urbana-Champaign. read more

New theory explains how Earth's inner core remains solid despite extreme heat February 13, 2017, KTH Royal Institute of Technology Anatoly Belonoshko, researcher in the Department of Physics at KTH Royal Institute of Technology, Stockholm. read more