The Centre of the Earth Is 1,000°C Hotter Than We Thought  By
Jamie Condliffe on at  A new series of measurements have
revealed that the Earth's core is actually 1,000°C hotter than
we previously thought — meaning the centre of our planet is
actually as hot as the surface of the Sun.  We've long known
that the very core of the planet — despite being exceedingly hot
— is made of solid, crystalline iron because of the immense
pressures it experiences. But a new series of experiments
suggests that the crystal structure actually forms at far higher
temperatures than previously predicted.  Tests in the early 90s
suggested that the core's temperature should be approximately
5,000°C. But now, a team of scientists have used X-rays to probe
samples of iron, held at extremely high temperatures, to better
understand how the unique crystal structure of the core forms.
The pressures were created using something called a diamond
anvil cell, which holds a sample between two machined synthetic
diamonds. By applying immense